Examine source code of Pink Paintbrush

{
  "theme": {
    "images": {
      "theme_frame": "Pink_Paintbrush_Top.png"
    },
    "colors": {
      "frame": "#ff6bf3",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Pink Paintbrush",
  "manifest_version": 2,
  "description": "A paintbrush leaves a trail of pink paint across a black background..."
}