Examine source code of mars purple

{
  "name": "mars purple",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "retrohalo.jpg"
    },
    "colors": {
      "frame": "rgba(26, 17, 55, 1)",
      "tab_background_text": "rgba(29, 117, 232, 1)",
      "toolbar": "rgba(26, 17, 55, 1)",
      "bookmark_text": "rgba(20, 247, 49, 1)",
      "toolbar_field": "rgba(26, 17, 55, 1)",
      "toolbar_field_text": "rgba(155, 62, 199, 1)"
    }
  }
}