Examine source code of Midnight Darkblue II

{
  "theme": {
    "images": {
      "theme_frame": "Midnight_Darkblue_II_1.jpg"
    },
    "colors": {
      "frame": "#f0f0f0",
      "tab_background_text": "#ccccff"
    }
  },
  "version": "2.0",
  "name": "Midnight Darkblue II",
  "manifest_version": 2,
  "description": "Midnight Darkblue reworked to make it looking darker"
}