Examine source code of Purple-Yellow

{
  "name": "Purple-Yellow",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "transparent.png"
    },
    "colors": {
      "frame": "rgba(33, 20, 32, 1)",
      "tab_background_text": "rgba(249, 240, 218, 1)",
      "toolbar": "rgba(64, 39, 62, 1)",
      "bookmark_text": "rgba(249, 240, 218, 1)",
      "toolbar_field": "rgba(33, 20, 32, 1)",
      "toolbar_field_text": "rgba(255, 177, 3, 1)"
    }
  }
}