Examine source code of Theme with Royal Colors

{
  "name": "Theme with Royal Colors",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "Jewel Colors copy.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 0.81)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 29, 250, 0.31)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 3, 3, 0.21)",
      "toolbar_field_text": "rgba(20, 0, 0, 0.84)"
    }
  }
}