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<!DOCTYPE html>
<!--
mkcolor - a vim color scheme randomizer/previewer
Written in 2020 by QuietMisdreavus <victoria@quietmisdreavus.net>
To the extent possible under law, the author(s) have dedicated all copyright
and related and neighboring rights to this software to the public domain
worldwide. This software is distributed without any warranty.
You should have received a copy of the CC0 Public Domain Dedication along
with this software. If not, see
<http://creativecommons.org/publicdomain/zero/1.0/>.
-->
<html>
<head>
<meta charset="utf-8" />
<title>random colors</title>
<link rel="stylesheet" href="color.css" />
<link rel="stylesheet" href="palette.css" />
</head>
<body>
<div id="wrapper">
<h1>mkcolor</h1>
<div id="buttons">
<button type="button" id="rando">Change colors</button>
<button type="button" id="download" disabled autocomplete="off">Generate Vim color scheme file</button>
</div>
<div id="colors">
<div id="demo">
<input type="radio" name="nav-tab" class="nav-radio" id="nav-rust" checked />
<input type="radio" name="nav-tab" class="nav-radio" id="nav-js" />
<input type="radio" name="nav-tab" class="nav-radio" id="nav-editor" />
<input type="radio" name="nav-tab" class="nav-radio" id="nav-ui" />
<div id="tabs">
<label for="nav-rust" id="label-rust" class="tab">Rust</label>
<label for="nav-js" id="label-js" class="tab">JavaScript</label>
<label for="nav-editor" id="label-editor" class="tab">Editor</label>
<label for="nav-ui" id="label-ui" class="tab">UI</label>
</div>
<div id="blocks">
<pre id="block-rust">
<span class="linenr"> 1 </span><span class="comment">// Definition modified from the Rust standard library</span>
<span class="linenr"> 2 </span><span class="comment">// <span class="todo">XXX</span>: This is missing the stability/internal attributes</span>
<span class="linenr"> 3 </span><span class="special">/// The `Option` type.</span>
<span class="linenr"> 4 </span><span class="special">///</span>
<span class="linenr"> 5 </span><span class="special">/// ```</span>
<span class="linenr"> 6 </span><span class="special">/// </span><span class="statement">let</span> my_opt = <span class="constant">Some</span>(<span class="constant">5</span>);
<span class="linenr"> 7 </span><span class="special">/// ```</span>
<span class="linenr"> 8 </span><span class="preproc">#[derive(<span class="type">Copy</span>, <span class="type">PartialEq</span>, <span class="type">PartialOrd</span>, <span class="type">Eq</span>, <span class="type">Ord</span>, <span class="type">Debug</span>, <span class="type">Hash</span>)]</span>
<span class="linenr"> 9 </span><span class="statement">pub</span> <span class="statement">enum</span> <span class="identifier">Option</span><T> {
<span class="linenr"> 10 </span> <span class="special">/// No value</span>
<span class="linenr"> 11 </span> <span class="identifier">None</span>,
<span class="linenr"> 12 </span> <span class="special">/// Some value `T`</span>
<span class="linenr"> 13 </span> <span class="identifier">Some</span>(T),
<span class="linenr"> 14 </span>}
<span class="linenr"> 15 </span>
<span class="linenr"> 16 </span><span class="statement">impl</span><T> <span class="type">Option</span><T> {
<span class="linenr"> 17 </span> <span class="special">/// Maps an `Option<T>` to `Option<U>` by applying a function</span>
<span class="linenr"> 18 </span> <span class="special">/// to a contained value.</span>
<span class="linenr"> 19 </span> <span class="preproc">#[inline]</span>
<span class="linenr"> 20 </span> <span class="statement">pub fn</span> <span class="identifier">map</span><U, F: <span class="type">FnOnce</span>(T) <span class="statement">-></span> U>(<span class="constant">self</span>, f: F) -> <span class="type">Option</span><U> {
<span class="linenr"> 21 </span> <span class="statement">match</span> <span class="constant">self</span> {
<span class="linenr"> 22 </span> <span class="constant">Some</span>(x) <span class="statement">=></span> <span class="constant">Some</span>(<span class="identifier">f</span>(x)),
<span class="linenr"> 23 </span> <span class="constant">None</span> <span class="statement">=></span> <span class="constant">None</span>,
<span class="linenr"> 24 </span> }
<span class="linenr"> 25 </span> }
<span class="linenr"> 26 </span>}
</pre>
<pre id="block-js">
<span class="linenr"> 1 </span><span class="comment">// Create a new color object with the given RGB values, and, if present,</span>
<span class="linenr"> 2 </span><span class="comment">// the given ANSI index.</span>
<span class="linenr"> 3 </span><span class="statement">function</span> newColor(r, g, b, idx) <span class="statement">{</span>
<span class="linenr"> 4 </span> <span class="identifier">let</span> col = <span class="statement">{</span> r: r, g: g, b: b <span class="statement">}</span>;
<span class="linenr"> 5 </span> <span class="identifier">let</span> rStr = col.r.toString(16).padStart(2, <span class="constant">'0'</span>).toUpperCase();
<span class="linenr"> 6 </span> <span class="identifier">let</span> gStr = col.g.toString(16).padStart(2, <span class="constant">'0'</span>).toUpperCase();
<span class="linenr"> 7 </span> <span class="identifier">let</span> bStr = col.b.toString(16).padStart(2, <span class="constant">'0'</span>).toUpperCase();
<span class="linenr"> 8 </span> col.hex = <span class="constant">`#<span class="special">${rStr}${gStr}${bStr}</span>`</span>;
<span class="linenr"> 9 </span> col.text = <span class="constant">`#<span class="special">${rStr}${gStr}${bStr}</span>`</span>;
<span class="linenr"> 10 </span>
<span class="linenr"> 11 </span> <span class="statement">if</span> (idx) <span class="statement">{</span>
<span class="linenr"> 12 </span> col.idx = idx;
<span class="linenr"> 13 </span> col.text += <span class="constant">` (ANSI <span class="special">${idx}</span>)`</span>;
<span class="linenr"> 14 </span> <span class="statement">}</span>
<span class="linenr"> 15 </span>
<span class="linenr"> 16 </span> <span class="statement">return</span> col;
<span class="linenr"> 17 </span>}</pre>
<pre id="block-editor">
<span class="tablinefill"><span class="tabline"> demo.rs </span><span class="tabline"> demo.js </span><span class="tablinesel"> Editor Demo </span><span class="tabline"> UI Demo </span><span class="tabline right">X</span></span>
<span class="foldcolumn"> </span><span class="linenr"> 1 </span> <span class="cursorcolumn"> </span>
<span class="foldcolumn"> </span><span class="linenr"> 2 </span> <span class="cursorcolumn"> </span>
<span class="foldcolumn"> </span><span class="cursorlinenr"> 3 </span><span class="cursorline">the cursor is <span class="cursor">h</span>ere</span>
<span class="foldcolumn"> </span><span class="linenr"> 4 </span>
<span class="foldcolumn"> </span><span class="linenr"> 5 </span>check out <span class="visual">visual mode</span>
<span class="foldcolumn"> </span><span class="linenr"> 6 </span>
<span class="foldcolumn"> </span><span class="linenr"> 7 </span>looking for <span class="incsearch">something</span>?
<span class="foldcolumn"> </span><span class="linenr"> 8 </span>maybe it's <span class="search">already here</span>
<span class="foldcolumn"> </span><span class="linenr"> 9 </span>
<span class="foldcolumn"> </span><span class="linenr"> 10 </span><span class="cursor">(</span>matching parens<span class="matchparen">)</span>
<span class="foldcolumn"> </span><span class="linenr"> 11 </span>
<span class="foldcolumn"> </span><span class="linenr"> 12 </span>Looks like <span class="spellbad">thsi</span> word is spelled wrong
<span class="foldcolumn"> </span><span class="linenr"> 13 </span><span class="spellcap">lowercase</span> words get flagged too
<span class="foldcolumn"> </span><span class="linenr"> 14 </span>the word <span class="spellrare">vim</span> is a "rare" word
<span class="foldcolumn"> </span><span class="linenr"> 15 </span>and "<span class="spelllocal">okay</span>" is a "local" word
<span class="foldcolumn"> </span><span class="linenr"> 16 </span>
<span class="foldcolumn"> </span><span class="linenr"> 17 </span><span class="title"># Heading 1</span><span class="specialkey">$</span>
<span class="foldcolumn">- </span><span class="linenr"> 18 </span>these paragraphs have 'list' set<span class="specialkey">$</span>
<span class="foldcolumn">| </span><span class="linenr"> 19 </span><span class="specialkey">$</span>
<span class="foldcolumn">| </span><span class="linenr"> 20 </span><span class="title">## Heading 1.1</span><span class="specialkey">$</span>
<span class="foldcolumn">|+</span><span class="linenr"> 21 </span><span class="folded">+---- 2 lines: this paragraph is folded</span>
<span class="foldcolumn"> </span><span class="linenr"> 22 </span><span class="specialkey">$</span>
<span class="signcolumn"> </span><span class="linenr"> 23 </span>
<span class="signcolumn">--</span><span class="linenr"> 24 </span><span class="diffdelete">this line was deleted</span>
<span class="signcolumn"> </span><span class="linenr"> 25 </span><span class="diffchange">this line changed <span class="difftext">this text</span></span>
<span class="signcolumn">++</span><span class="linenr"> 26 </span><span class="diffadd">this line was added</span>
<span class="signcolumn"> </span><span class="linenr"> 27 </span>
<span class="signcolumn">>></span><span class="linenr"> 28 </span>this line has <span class="error">an error</span> in it
<span class="signcolumn"> </span><span class="linenr"> 29 </span>
<span class="nontext">~</span>
<span class="nontext">~</span>
<span class="statusline">Editor Demo<span class="right">3,15 All</span></span>
</pre>
<pre id="block-ui">
<span class="tablinefill"><span class="tabline"> demo.rs </span><span class="tabline"> demo.js </span><span class="tabline"> Editor Demo </span><span class="tablinesel"> UI Demo </span><span class="tabline right">X</span></span>
this screen shows <span class="vertsplit">|</span>
various other Vim- <span class="vertsplit">|</span> f
specific UI elements <span class="vertsplit">|</span> <span class="pmenu">foo </span><span class="pmenusbar"> </span>
<span class="vertsplit">|</span> <span class="pmenusel">foobar </span><span class="pmenusbar"> </span>
<span class="vertsplit">|</span> <span class="pmenu">fun </span><span class="pmenuthumb"> </span>
<span class="vertsplit">|</span> <span class="pmenu">function </span><span class="pmenusbar"> </span>
<span class="vertsplit">|</span>
<span class="vertsplit">|</span>
<span class="vertsplit">|</span>
<span class="vertsplit">|</span>
<span class="vertsplit">|</span>
<span class="vertsplit">|</span>
<span class="vertsplit">|</span>
<span class="vertsplit">|</span>
<span class="statuslinenc">inactive status </span><span class="statusline">active status</span>
<span class="warningmsg">W10: Warning: Changing a readonly file</span>
<span class="errormsg">E37: No write since last change (add ! to override)</span>
<span class="modemsg">-- INSERT --</span>
<span class="moremsg">-- More --</span>
one-file another-file a-third-file
<span class="directory">one-directory/</span> <span class="directory">another-directory/</span>
<span class="statusline">one-file another-file <span class="wildmenu">a-third-file</span></span>
</pre>
</div>
</div>
<div id="palette-box">
<div id="details" class="top-col">
<div id="ratio-wrap">
Contrast ratio: <span id="ratio">21</span>
</div>
<div id="palette" class="palette">
<div>
<span class="block" id="bg-block"> </span>
Main background: <span id="bg-col">#000</span>
</div>
<div>
<span class="block" id="fg-block"> </span>
Main text: <span id="fg-col">#FFF</span>
</div>
<div>
<span class="block" id="comment-block"> </span>
Comments: <span id="comment-col">#FFF</span>
</div>
<div>
<span class="block" id="identifier-block"> </span>
Identifiers: <span id="identifier-col">#FFF</span>
</div>
<div>
<span class="block" id="constant-block"> </span>
Literals: <span id="constant-col">#FFF</span>
</div>
<div>
<span class="block" id="type-block"> </span>
Type names: <span id="type-col">#FFF</span>
</div>
<div>
<span class="block" id="statement-block"> </span>
Keywords: <span id="statement-col">#FFF</span>
</div>
<div>
<span class="block" id="preproc-block"> </span>
Preprocessor: <span id="preproc-col">#FFF</span>
</div>
<div>
<span class="block" id="special-block"> </span>
Special tokens: <span id="special-col">#FFF</span>
</div>
<div>
<span class="block" id="title-block"> </span>
Titles: <span id="title-col">#FFF</span>
</div>
<div>
<span class="block" id="todo-block"> </span>
TODO markers: <span id="todo-col">#220</span>
</div>
<div>
<span class="block" id="error-block"> </span>
Syntax errors: <span id="error-col">#200</span>
</div>
<div>
<span class="block" id="modemsg-block"> </span>
'showmode' message: <span id="modemsg-col">#FFF</span>
</div>
<div>
<span class="block" id="moremsg-block"> </span>
"More" prompt: <span id="moremsg-col">#FFF</span>
</div>
<div>
<span class="block" id="directory-block"> </span>
Directories in file listings: <span id="directory-col">#FFF</span>
</div>
<div>
<span class="block" id="spellbad-block"> </span>
Incorrect spelling: <span id="spellbad-col">#FFF</span>
</div>
<div>
<span class="block" id="spellcap-block"> </span>
Incorrect capitalization: <span id="spellcap-col">#FFF</span>
</div>
<div>
<span class="block" id="spellrare-block"> </span>
Rare words: <span id="spellrare-col">#FFF</span>
</div>
<div>
<span class="block" id="spelllocal-block"> </span>
Locally-defined words: <span id="spelllocal-col">#FFF</span>
</div>
<div>
<span class="block" id="nontext-block"> </span>
End-of-file marker: <span id="nontext-col">#444</span>
</div>
<div>
<span class="block" id="specialkey-block"> </span>
End-of-line marker: <span id="specialkey-col">#AAA</span>
</div>
</div>
</div>
<div id="top-col3" class="top-col">
<div id="bg-palette" class="palette">
<div>
<span class="block" id="diffdelete-block"> </span>
Deleted lines: <span id="diffdelete-col">#200</span>
</div>
<div>
<span class="block" id="diffchange-block"> </span>
Changed lines: <span id="diffchange-col">#222</span>
</div>
<div>
<span class="block" id="difftext-block"> </span>
Changed text: <span id="difftext-col">#000</span>
</div>
<div>
<span class="block" id="diffadd-block"> </span>
Added lines: <span id="diffadd-col">#020</span>
</div>
<div>
<span class="block" id="cursor-block"> </span>
Cursor: <span id="cursor-col">#FFF</span>
</div>
<div>
<span class="block" id="cursorline-block"> </span>
Cursor line: <span id="cursorline-col">#111</span>
</div>
<div>
<span class="block" id="cursorcolumn-block"> </span>
Cursor column: <span id="cursorcolumn-col">#111</span>
</div>
<div>
<span class="block" id="visual-block"> </span>
Visual selection: <span id="visual-col">#222</span>
</div>
<div>
<span class="block" id="incsearch-block"> </span>
Incremental search: <span id="incsearch-col">#222</span>
</div>
<div>
<span class="block" id="search-block"> </span>
Search results: <span id="search-col">#222</span>
</div>
<div>
<span class="block" id="matchparen-block"> </span>
Matching parentheses: <span id="matchparen-col">#222</span>
</div>
<div>
<span class="block" id="warningmsg-block"> </span>
Warning messages: <span id="warningmsg-col">#200</span>
</div>
<div>
<span class="block" id="errormsg-block"> </span>
Error messages: <span id="errormsg-col">#200</span>
</div>
<div>
<span class="block" id="wildmenu-block"> </span>
Tab-completion menu selection: <span id="wildmenu-col">#DDD</span>
</div>
</div>
</div>
<div id="top-col4" class="top-col">
<div id="ui-palette" class="palette">
<div>
<span class="block" id="linenr-bg-block"> </span>
Line number background: <span id="linenr-bg-col">#000</span>
</div>
<div>
<span class="block" id="linenr-fg-block"> </span>
Line number text: <span id="linenr-fg-col">#FFF</span>
</div>
<div>
<span class="block" id="cursorlinenr-bg-block"> </span>
Cursor line number background: <span id="cursorlinenr-bg-col">#000</span>
</div>
<div>
<span class="block" id="cursorlinenr-fg-block"> </span>
Cursor line number text: <span id="cursorlinenr-fg-col">#FFF</span>
</div>
<div>
<span class="block" id="statusline-bg-block"> </span>
Status line background: <span id="statusline-bg-col">#FFF</span>
</div>
<div>
<span class="block" id="statusline-fg-block"> </span>
Status line text: <span id="statusline-fg-col">#000</span>
</div>
<div>
<span class="block" id="statuslinenc-bg-block"> </span>
Inactive status line background: <span id="statuslinenc-bg-col">#FFF</span>
</div>
<div>
<span class="block" id="statuslinenc-fg-block"> </span>
Inactive status line text: <span id="statuslinenc-fg-col">#000</span>
</div>
<div>
<span class="block" id="tabline-bg-block"> </span>
Tab line background: <span id="tabline-bg-col">#000</span>
</div>
<div>
<span class="block" id="tabline-fg-block"> </span>
Tab line text: <span id="tabline-fg-col">#FFF</span>
</div>
<div>
<span class="block" id="tablinesel-bg-block"> </span>
Selected tab background: <span id="tablinesel-bg-col">#FFF</span>
</div>
<div>
<span class="block" id="tablinesel-fg-block"> </span>
Selected tab text: <span id="tablinesel-fg-col">#000</span>
</div>
<div>
<span class="block" id="tablinefill-block"> </span>
Tab line blank space: <span id="tablinefill-col">#222</span>
</div>
<div>
<span class="block" id="folded-bg-block"> </span>
Folded text background: <span id="folded-bg-col">#000</span>
</div>
<div>
<span class="block" id="folded-fg-block"> </span>
Folded text: <span id="folded-fg-col">#FFF</span>
</div>
<div>
<span class="block" id="foldcolumn-bg-block"> </span>
Fold column background: <span id="foldcolumn-bg-col">#000</span>
</div>
<div>
<span class="block" id="foldcolumn-fg-block"> </span>
Fold column text: <span id="foldcolumn-fg-col">#FFF</span>
</div>
<div>
<span class="block" id="signcolumn-bg-block"> </span>
Sign column background: <span id="signcolumn-bg-col">#000</span>
</div>
<div>
<span class="block" id="signcolumn-fg-block"> </span>
Sign column text: <span id="signcolumn-fg-col">#FFF</span>
</div>
<div>
<span class="block" id="vertsplit-bg-block"> </span>
Vertical split background: <span id="vertsplit-bg-col">#FFF</span>
</div>
<div>
<span class="block" id="vertsplit-fg-block"> </span>
Vertical split text: <span id="vertsplit-fg-col">#000</span>
</div>
<div>
<span class="block" id="pmenu-bg-block"> </span>
Popup menu background: <span id="pmenu-bg-col">#FFF</span>
</div>
<div>
<span class="block" id="pmenu-fg-block"> </span>
Popup menu text: <span id="pmenu-fg-col">#000</span>
</div>
<div>
<span class="block" id="pmenusel-bg-block"> </span>
Popup menu selection background: <span id="pmenusel-bg-col">#DDD</span>
</div>
<div>
<span class="block" id="pmenusel-fg-block"> </span>
Popup menu selection text: <span id="pmenusel-fg-col">#000</span>
</div>
<div>
<span class="block" id="pmenusbar-block"> </span>
Popup menu scrollbar: <span id="pmenusbar-col">#DDD</span>
</div>
<div>
<span class="block" id="pmenuthumb-block"> </span>
Popup menu scrollbar position: <span id="pmenuthumb-col">#FFF</span>
</div>
</div>
</div>
</div>
</div>
<hr />
<div id="settings">
<div class="form-block">
<input type="checkbox" id="use-ansi" name="use-ansi" />
<label for="use-ansi">Use ANSI terminal colors</label>
</div>
<div class="form-block">
<div>Contrast with background:</div>
<div>
<input type="radio" id="v-hi-con" name="contrast" value="v-hi" />
<label for="v-hi-con">Require <abbr title="Contrast ratio greater than 7">high contrast</abbr>*</label>
</div>
<div>
<input type="radio" id="hi-con" name="contrast" value="hi" checked />
<label for="hi-con">Require <abbr title="Contrast ratio greater than 4.5">medium contrast</abbr></label>
</div>
<div>
<input type="radio" id="lo-con" name="contrast" value="lo" />
<label for="lo-con">Allow <abbr title="Contrast ratio as low as 3">low contrast</abbr></label>
</div>
<div>
<input type="radio" id="any-con" name="contrast" value="any" />
<label for="any-con">Allow any contrast</label>
</div>
</div>
<div class="form-block">
<div>UI frame background contrast (against main background):</div>
<div>
<input type="radio" id="ui-lo" name="ui-contrast" value="lo" checked />
<label for="ui-lo">Require <abbr title="Contrast ratio below 3">low contrast</abbr></label>
</div>
<div>
<input type="radio" id="ui-hi" name="ui-contrast" value="hi" />
<label for="ui-hi">Require <abbr title="Contrast ratio greater than 4.5">medium or higher contrast</abbr></label>
</div>
<div>
<input type="radio" id="ui-any" name="ui-contrast" value="any" />
<label for="ui-any">Allow any contrast</label>
</div>
<div>
<input type="radio" id="ui-tweak" name="ui-contrast" value="tweak" />
<label for="ui-tweak">(Experimental) Tweak the main background to create UI frames</label>
</div>
</div>
<div class="form-block">
<div>
<input type="checkbox" id="cursorcolumn-same" value="cursorcolumn-same" checked />
<label for="cursorcolumn-same">Cursor column = Cursor line</label>
</div>
<div>
<input type="checkbox" id="foldcolumn-same" value="foldcolumn-same" />
<label for="foldcolumn-same">Fold column = Line numbers</label>
</div>
<div>
<input type="checkbox" id="signcolumn-same" value="signcolumn-same" />
<label for="signcolumn-same">Sign column = Fold column</label>
</div>
<div>
<input type="checkbox" id="tablinefill-same" value="tablinefill-same" checked />
<label for="tablinefill-same">Tab line blank space = Tab line background</label>
</div>
<div>
<input type="checkbox" id="statuslinenc-same" value="statuslinenc-same" checked />
<label for="statuslinenc-same">Inactive status line = Status line</label>
</div>
<div>
<input type="checkbox" id="vertsplit-same" value="vertsplit-same" checked />
<label for="vertsplit-same">Vertical split = Status line</label>
</div>
<div>
<input type="checkbox" id="cursorlinenr-same" value="cursorlinenr-same" checked />
<label for="cursorlinenr-same">Cursor line number = Line number</label>
</div>
</div>
<div class="form-block">
<div>
<input type="checkbox" id="bg-distinct" value="bg-distinct" checked />
<label for="bg-distinct">Force highlight colors to be <abbr title="See below">distinct</abbr> from the background</label>
</div>
<div>
<input type="checkbox" id="bg-distinct-all" value="bg-distinct-all" checked />
<label for="bg-distinct-all">Force highlight colors to be <abbr title="See below">distinct</abbr> from each other*</label>
</div>
<div>
<input type="checkbox" id="fg-distinct" value="fg-distinct" checked />
<label for="fg-distinct">Force text colors to be <abbr title="See below">distinct</abbr> from each other*</label>
</div>
<div>
<input type="checkbox" id="spell-red" value="spell-red" checked />
<label for="spell-red">
Force "Incorrect spelling" to be
<abbr title="Hue between +36 and -36 degrees">"reddish"</abbr>
</label>
</div>
<div>
<input type="checkbox" id="force-diffdelete" value="force-diffdelete" />
<label for="force-diffdelete">
Force "Deleted lines" to be
<abbr title="Hue between +36 and -36 degrees">"reddish"</abbr>
</label>
</div>
<div>
<input type="checkbox" id="force-diffadd" value="force-diffadd" />
<label for="force-diffadd">
Force "Added lines" to be
<abbr title="Hue between 84 and 156 degrees">"greenish"</abbr>
</label>
</div>
</div>
</div>
<div style="text-align: center;">
<p>*May increase calculation time</p>
</div>
<hr />
<div id="about">
<p><a href="https://github.com/QuietMisdreavus/mkcolor">Source code</a></p>
<p>
<b>mkcolor</b> is an experiment in randomly generating text-editor color schemes. Using the
<a href="https://www.w3.org/TR/WCAG20/#contrast-ratiodef">WCAG definition of contrast ratio</a>, the
<a href="https://en.wikipedia.org/wiki/CIELAB_color_space">CIELAB color space</a>, and a lot of
random numbers, this code can (most of the time) generate something that is pretty legible,
according to some basic parameters.
</p>
<p>
When generating a color scheme, the base contrast ratio between the background color and the main
foreground color is displayed, alongside all the other colors generated. The color list is available
in case you would like to use a generated color scheme in your own editor or project.
</p>
<p>
In addition to settings that tweak things like the minimum acceptable contrast ratio or restraints
on whether certain categories of colors should be "distinct", an option is available to use
<a href="https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit">8-bit ANSI terminal color codes</a>
instead of 24-bit RGB color. This allows you to use these colors in a terminal text editor, like
non-GUI Vim. When this setting is active, the ANSI code for any given color will be given alongside
its 24-bit hex code.
</p>
<p>
When deciding whether two colors are "distinct", <b>mkcolor</b> uses both the contrast ratio as well
as a Euclidean distance in the CIELAB color space. If the contrast ratio between two text colors is
greater than 1.06 and the CIELAB distance is greater than 20, then two colors are considered
"distinct". For two highlight colors, or when comparing a highlight color against the main
background, the contrast ratio needs to be greater than 1.008, and the CIELAB distance greater than
10. All highlight colors still need to maintain the requested minimum contrast ratio with all text
colors, so the "distinction" criteria are loosened to prevent runaway situations with a high
contrast ratio forbidding any color scheme.
</p>
<p>
The experimental "tweak the main background" feature uses a random walk in the CIELAB color space to
take the main background color and create a new one that's similar to it. It won't work while "Use
ANSI terminal colors" is enabled because doing so creates colors that are outside the ANSI 256-color
space. Selecting either option will disable the other one until it has been deselected. (If you know
how to do color-space conversions to the closest ANSI 8-bit color, get in touch! The source code is
available at the link above.)
</p>
<p>
This project owes its inspiration and existence to a number of resources, including (but not limited
to):
<ul>
<li>The <a href="https://botsin.space/@randomColorContrasts">Random Color Contrasts</a> Mastodon
bot, and its source data, <a href="https://randoma11y.com/">randoma11y.com</a>, for the
initial inspiration to combine colors together randomly and make something beautiful out of
it</li>
<li><a href="http://vim-ink.github.io/">vim.ink</a>, a Vim color scheme designer, with a
practically-exhaustive list of potential items to add to a color scheme</li>
<li>The equations on the WCAG documentation, and in the Wikipedia articles mentioned above</li>
<li><a href="https://developer.mozilla.org">Mozilla Developer Network</a>, because i learned a
lot about CSS and JavaScript while writing this</li>
</ul>
</p>
</div>
</div>
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<script src="random.js"></script>
<script src="color.js"></script>
<script src="render.js"></script>
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