Examine source code of Kopke

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "COLORS2",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(57, 74, 77)",
      "toolbar_text": "rgb(15, 24, 23)",
      "frame": "rgb(15, 24, 23)",
      "tab_background_text": "rgb(229, 220, 210)",
      "toolbar_field": "rgb(46, 52, 64)",
      "toolbar_field_text": "rgb(229, 220, 210)",
      "tab_line": "rgb(15, 24, 23)",
      "popup": "rgb(229, 220, 210)",
      "popup_text": "rgb(15, 24, 23)",
      "tab_loading": "rgb(15, 24, 23)"
    }
  }
}