Examine source code of 13th Doctor simple

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#362f36",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "13th Doctor simple",
  "manifest_version": 2,
  "description": "This simple theme is inspired by the 13th Doctor's shirt pattern."
}