Examine source code of BIG theme

{
  "name": "BIG theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "scratch-cat.svg"
    },
    "colors": {
      "frame": "rgba(0, 77, 255, 1)",
      "tab_background_text": "rgba(204, 116, 116, 1)",
      "toolbar": "rgba(34, 22, 145, 1)",
      "bookmark_text": "rgba(173, 107, 107, 1)",
      "toolbar_field": "rgba(214, 51, 51, 1)",
      "toolbar_field_text": "rgba(18, 14, 14, 1)",
      "tab_line": "rgba(255, 3, 3, 1)"
    }
  }
}