Examine source code of DarkRainbow

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Dark Rainbow",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgba(39, 34, 46, 0.92)",
      "toolbar_field": "rgba(0, 0, 0, 0.2)",
      "toolbar_field_text": "rgb(250, 19, 85)",
      "tab_line": "rgb(28, 171, 176)",
      "popup": "rgb(22, 54, 75)",
      "popup_text": "rgb(251, 131, 165)",
      "tab_loading": "rgb(28, 171, 176)",
      "bookmark_text": "rgb(27, 170, 177)",
      "frame": "rgb(22, 54, 75)",
      "tab_background_text": "rgb(148, 157, 173)"
    }
  }
}