Examine source code of Royal Blue Cocktail

{
  "name": "Royal Blue",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "25, 24, 66.png"
    },
    "colors": {
      "frame": "rgba(25, 24, 66, 1)",
      "tab_background_text": "rgba(192, 238, 242, 0.5)",
      "toolbar": "rgba(83, 127, 231, 0.5)",
      "bookmark_text": "rgba(233, 248, 249, 1)",
      "toolbar_field": "rgba(25, 24, 66, 1)",
      "toolbar_field_text": "rgba(192, 238, 242, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8502e659-4990-4e2e-8a1b-9a692fae7823}"
    }
  }
}