Examine source code of Color Prints

{
  "theme": {
    "images": {
      "theme_frame": "firefoxbar.png"
    },
    "colors": {
      "frame": "#f79ce3",
      "tab_background_text": "#480b99"
    }
  },
  "version": "2.0",
  "name": "Color Prints",
  "manifest_version": 2,
  "description": "Pastel colors with a hint of what looks like fingerprints."
}