github-dark-calendar-color-customizer.user.css

/* ==UserStyle==
@name         GitHub Dark Calendar Color Customizer
@namespace    StylishThemes
@version      2.0.12
@description  A GitHub Dark calendar color customization style
@author       StylishThemes and contributors
@homepageURL  https://github.com/StylishThemes/Feature-Override-Styles/
@supportURL   https://github.com/StylishThemes/Feature-Override-Styles/issues/new/choose
@updateURL    https://raw.githubusercontent.com/StylishThemes/Feature-Override-Styles/master/github-dark-calendar-color-customizer.user.css
@license      MIT

@var color base-color "Regular color" #7bc96f
@var color  halloween  "Halloween color" #ffee4a

@preprocessor stylus
==/UserStyle== */
@-moz-document regexp("^https?://?github\\.com/((?!generated_pages/preview).)*$") {
  /* contribution calendar */
  :root {
    --color-calendar-graph-day-L1-bg: darken(base-color, 70%) //#9be9a8;
    --color-calendar-graph-day-L2-bg: darken(base-color, 50%) //#40c463;
    --color-calendar-graph-day-L3-bg: darken(base-color, 20%)//#30a14e;
    --color-calendar-graph-day-L4-bg: base-color //#216e39;
    --color-calendar-halloween-graph-day-L1-bg: darken(halloween, 70%) //#ffee4a;
    --color-calendar-halloween-graph-day-L2-bg: darken(halloween, 50%) //#ffc501;
    --color-calendar-halloween-graph-day-L3-bg: darken(halloween, 20%) //#fe9600;
    --color-calendar-halloween-graph-day-L4-bg: halloween //#03001c;
  }
}