Examine source code of Tangerine grey

{
  "name": "Tangerine grey",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "fond_Tangerine_Grey.png"
    },
    "colors": {
      "frame": "rgba(38, 38, 38, 0.5)",
      "tab_background_text": "rgba(240, 123, 39, 0.53)",
      "toolbar": "rgba(240, 123, 39, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(51, 51, 51, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.72)",
      "tab_line": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fdfd5c7b-8551-45c4-b243-4219f10994f0}"
    }
  }
}