Examine source code of Undertaker Eyes 2

{
  "theme": {
    "images": {
      "theme_frame": "UndertakerHeader2.png"
    },
    "colors": {
      "frame": "#0b2100",
      "tab_background_text": "#363636"
    }
  },
  "version": "2.0",
  "name": "Undertaker Eyes 2",
  "manifest_version": 2,
  "description": "Again, Undertaker from Kuroshitsuji or Black Butler. XD"
}