Examine source code of Mercury Media

{
  "name": "Mercury Logo",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Mercury Logo.png"
    },
    "colors": {
      "frame": "rgba(0, 45, 101, 1)",
      "tab_background_text": "rgba(241, 241, 241, 1)",
      "bookmark_text": "rgba(244, 158, 64, 1)",
      "toolbar_field": "rgba(0, 177, 195, 1)",
      "toolbar_field_text": "rgba(217, 217, 217, 1)"
    }
  }
}