Examine source code of Yotsuba purple

{
  "theme": {
    "images": {
      "theme_frame": "top.png"
    },
    "colors": {
      "frame": "#c183d4",
      "tab_background_text": "#d7d5d5"
    }
  },
  "version": "2.0",
  "name": "Yotsuba purple",
  "manifest_version": 2,
  "description": "test"
}