Examine source code of black and purple glass

{
  "name": "evanescence",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Evanescence-Logo.jpg"
    },
    "colors": {
      "frame": "rgba(3, 3, 3, 0.86)",
      "tab_background_text": "rgba(170, 0, 255, 0.82)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8bb0ca51-19d0-4d01-993b-3783c904d47f}"
    }
  }
}