Examine source code of Purple Sprinkle

{
  "theme": {
    "images": {
      "theme_frame": "firefoxheadertheme.jpg"
    },
    "colors": {
      "frame": "#c953e6",
      "tab_background_text": "#5c5c5c"
    }
  },
  "version": "2.0",
  "name": "Purple Sprinkle",
  "manifest_version": 2,
  "description": "A custom purple rain of sprinkles!"
}