Examine source code of ubuntu mate custom

{
  "name": "ubuntu mate",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "GreenTraditional.jpg"
    },
    "colors": {
      "frame": "rgba(60, 59, 55, 1)",
      "tab_background_text": "rgba(135, 165, 86, 1)",
      "toolbar": "rgba(76, 74, 68, 1)",
      "bookmark_text": "rgba(135, 165, 86, 1)",
      "toolbar_field": "rgba(80, 78, 72, 1)",
      "toolbar_field_text": "rgba(135, 165, 86, 1)"
    }
  }
}