Examine source code of Steven Universe2

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Steven Universe2",
  "manifest_version": 2,
  "description": "Not really a fan of the show, but it has such pretty art and colors!  Wanted to make a theme for myself - but it's free to use by anyone else."
}