Examine source code of colors

{
  "name": "colors",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "c4aea5cda811e1639f1bdaf2b47ea5cc.jpg"
    },
    "colors": {
      "frame": "rgba(37, 91, 207, 1)",
      "tab_background_text": "rgba(3, 6, 82, 1)",
      "toolbar": "rgba(105, 126, 240, 1)",
      "bookmark_text": "rgba(69, 5, 60, 1)",
      "toolbar_field": "rgba(250, 237, 237, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}