Examine source code of Purple knobs

{
  "theme": {
    "images": {
      "theme_frame": "blueknobs2.jpg"
    },
    "colors": {
      "frame": "#e3b8f0",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Purple knobs",
  "manifest_version": 2,
  "description": "Purple purple purple"
}