Examine source code of dark satin

{
  "theme": {
    "images": {
      "theme_frame": "darksatin.jpg"
    },
    "colors": {
      "frame": "#4c57c9",
      "tab_background_text": "#c4a7f2"
    }
  },
  "version": "2.0",
  "name": "dark satin",
  "manifest_version": 2,
  "description": "dark blue satin"
}