Examine source code of andy's theme

{
  "name": "andy's theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 209, 123, 1)",
      "toolbar": "rgba(34, 48, 77, 1)",
      "bookmark_text": "rgba(255, 209, 123, 1)",
      "toolbar_field_text": "rgba(255, 209, 123, 1)",
      "tab_line": "rgba(238, 123, 75, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b3c8ed36-fb89-44eb-96bf-9b67e35a76ca}"
    }
  }
}