Examine source code of soft vanishing

{
  "theme": {
    "images": {
      "theme_frame": "negro3.png"
    },
    "colors": {
      "frame": "#24e3d3",
      "tab_background_text": "#ab24a9"
    }
  },
  "version": "2.0",
  "name": "soft vanishing",
  "manifest_version": 2,
  "description": "a pink light blue soft effect"
}