Examine source code of BVB_RURPOTT_FAN_THEME

{
  "name": "BVB_RURPOTT_FAN_THEME",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "BVB_SKULL-THEME-1.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 5, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(209, 202, 0, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(251, 255, 0, 1)"
    }
  }
}