Examine source code of CoolDark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "CoolDark",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(4, 4, 46)",
      "toolbar_text": "rgb(217, 26, 217)",
      "frame": "rgb(2, 10, 50)",
      "tab_background_text": "rgb(134, 3, 3)",
      "toolbar_field": "rgb(4, 4, 46)",
      "toolbar_field_text": "rgb(217, 26, 217)",
      "tab_line": "rgb(217, 26, 217)",
      "popup": "rgb(4, 4, 46)",
      "popup_text": "rgb(217, 26, 217)",
      "tab_loading": "rgb(217, 26, 217)"
    }
  }
}