Examine source code of special gradient 2

{
  "theme": {
    "images": {
      "theme_frame": "specialgradient2.png"
    },
    "colors": {
      "frame": "#c7adbe",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "special gradient 2",
  "manifest_version": 2,
  "description": "gradient degrade iridescent wine pink rose"
}