Examine source code of Ska theme

{
  "theme": {
    "images": {
      "theme_frame": "Ska.jpg"
    },
    "colors": {
      "frame": "#4f4f4f",
      "tab_background_text": "#6e6d6d"
    }
  },
  "version": "2.0",
  "name": "Ska theme",
  "manifest_version": 2,
  "description": "This is my ska persona"
}