Examine source code of Neo Blue

{
  "name": "Simple Blue",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "transparent svg.svg"
    },
    "colors": {
      "frame": "rgba(9, 32, 63, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(8, 41, 87, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(252, 252, 252, 1)",
      "toolbar_field_text": "rgba(11, 96, 181, 1)",
      "tab_line": "rgba(19, 70, 133, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a02e3cce-2044-441d-ad24-b50af8d3d1ca}"
    }
  }
}