Examine source code of SimpleSuperman

{
  "theme": {
    "images": {
      "theme_frame": "superman-header.png"
    },
    "colors": {
      "frame": "#b3b3b3",
      "tab_background_text": "#000005"
    }
  },
  "version": "2.0",
  "name": "SimpleSuperman",
  "manifest_version": 2,
  "description": "I like very simple themes. Not too dark or light, so I wanted to make my own because I could not find one to suit my needs."
}