Examine source code of From Ashes

{
  "theme": {
    "images": {
      "theme_frame": "fromashes_header.jpg"
    },
    "colors": {
      "frame": "#541b1b",
      "tab_background_text": "#a8a8a8"
    }
  },
  "version": "2.0",
  "name": "From Ashes",
  "manifest_version": 2,
  "description": "From the ash of a dead city, long time ago..."
}