Examine source code of Subtle bi colours

{
  "name": "Subtle bi colours ",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "colour pretty.png"
    },
    "colors": {
      "frame": "rgba(214, 0, 111, 1)",
      "tab_background_text": "rgba(152, 50, 155, 1)",
      "toolbar": "rgba(1, 54, 166, 1)",
      "bookmark_text": "rgba(214, 0, 111, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgba(3, 3, 3, 1)",
      "tab_line": "rgba(152, 50, 152, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fcfe7ae3-81e1-4e48-9d54-b04070529e8e}"
    }
  }
}