Examine source code of Handsome Jack

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Handsome Jack",
  "manifest_version": 2,
  "description": "I have been searching for a Handsome Jack theme so I made one myself. This is for me so i you don't like it... Well.. Sorry, I guess."
}