Examine source code of cold blue

{
  "name": "Cold Blue",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Google_ G _Logo.svg.png"
    },
    "colors": {
      "frame": "rgba(0, 77, 255, 1)",
      "tab_background_text": "rgba(0, 255, 251, 1)",
      "toolbar": "rgba(0, 87, 163, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 193, 252, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{72cd8732-51da-44dd-a005-39e25d34aa7d}"
    }
  }
}