Examine source code of Blue gray

{
  "name": "Blue gray",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "blue-gray-color-solid-background-1920x1080.png"
    },
    "colors": {
      "frame": "rgba(95, 127, 201, 1)",
      "tab_background_text": "rgba(87, 78, 78, 0.93)",
      "toolbar": "rgba(188, 195, 214, 1)",
      "bookmark_text": "rgba(69, 69, 69, 1)",
      "toolbar_field": "rgba(173, 173, 173, 1)",
      "toolbar_field_text": "rgba(69, 69, 69, 1)",
      "tab_line": "rgba(49, 90, 204, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{072d1d2f-33eb-4028-a917-d94ae10a46f3}"
    }
  }
}