Examine source code of CSKA Sofia Black & White

{
  "theme": {
    "images": {
      "theme_frame": "cska-bw-header.png"
    },
    "colors": {
      "frame": "#808080",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "CSKA Sofia Black & White",
  "manifest_version": 2,
  "description": "It's same as CSKA Sofia Persona, but this time - Black and White colours."
}