Examine source code of Purple Theme

{
  "name": "Purple Theme",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Purple.jpeg"
    },
    "colors": {
      "frame": "rgba(112, 64, 125, 1)",
      "tab_background_text": "rgba(255, 54, 54, 1)",
      "toolbar": "rgba(112, 64, 125, 1)",
      "bookmark_text": "rgba(255, 54, 54, 1)",
      "toolbar_field": "rgba(237, 237, 180, 1)",
      "toolbar_field_text": "rgba(255, 54, 54, 1)",
      "tab_line": "rgba(237, 237, 180, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{06f25fc5-bcb7-4556-87d7-9fa62bd6fca5}"
    }
  }
}