Chrome/FireFox Dev Tools Theme

userChrome.css

:root.theme-dark {
  --theme-body-background: rgb(32, 32, 32) !important;
  --theme-sidebar-background: rgb(32, 32, 32) !important;
 
  --theme-tab-toolbar-background: #161A1E !important;
  --theme-toolbar-background: #282E35 !important;
  --theme-selection-background: #478DAD !important;
 
  --theme-body-color: #D6D6D6 !important;
  --theme-body-color-alt: #D6D6D6 !important;
  --theme-content-color1: #D6D6D6 !important;
  --theme-content-color2: #D6D6D6 !important;
  --theme-content-color3: #D6D6D6 !important;
 
  --theme-highlight-green: #D6D6D6 !important;
  --theme-highlight-blue: rgb(82,165,207) !important;
  --theme-highlight-bluegrey: white !important;
  --theme-highlight-lightorange: #FF5A2C !important;
  --theme-highlight-orange: yellow !important;
  --theme-highlight-red: #D6D6D6 !important;
  --theme-highlight-pink: #D6D6D6 !important;
  --theme-highlight-purple: #56ac68 !important;
}

.originalTheme {
  --theme-body-background: #14171a;
  --theme-sidebar-background: #181d20;
  --theme-contrast-background: #b28025;
 
  --theme-tab-toolbar-background: #252c33;
  --theme-toolbar-background: #343c45;
  --theme-selection-background: #1d4f73;
  --theme-selection-background-semitransparent: rgba(29, 79, 115, .5);
  --theme-selection-color: #f5f7fa;
  --theme-splitter-color: black;
  --theme-comment: #757873;
 
  --theme-body-color: #8fa1b2;
  --theme-body-color-alt: #b6babf;
  --theme-content-color1: #a9bacb;
  --theme-content-color2: #8fa1b2;
  --theme-content-color3: #5f7387;
 
  --theme-highlight-green: #70bf53;
  --theme-highlight-blue: #46afe3;
  --theme-highlight-bluegrey: #5e88b0;
  --theme-highlight-purple: #6b7abb;
  --theme-highlight-lightorange: #d99b28;
  --theme-highlight-orange: #d96629;
  --theme-highlight-red: #eb5368;
  --theme-highlight-pink: #df80ff;
 
  /* Colors used in Graphs, like performance tools. Mostly similar to some "highlight-*" colors. */
  --theme-graphs-green: #70bf53;
  --theme-graphs-blue: #46afe3;
  --theme-graphs-bluegrey: #5e88b0;
  --theme-graphs-purple: #df80ff;
  --theme-graphs-yellow: #d99b28;
  --theme-graphs-orange: #d96629;
  --theme-graphs-red: #eb5368;
  --theme-graphs-grey: #757873;
  --theme-graphs-full-red: #f00;
  --theme-graphs-full-blue: #00f;
}