Examine source code of Chalk Sun 2

{
  "theme": {
    "images": {
      "theme_frame": "sun-blur_wood.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Chalk Sun 2",
  "manifest_version": 2,
  "description": "used a wood background to contrast the chalkiness of the sun"
}