Examine source code of Ubuntu Minimalista

{
  "name": "Ubuntu Minimalista",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "ubuntu-linux-minimalism_3840x2160_xtrafondos.com.jpg"
    },
    "colors": {
      "frame": "rgba(250, 126, 10, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(250, 126, 10, 1)",
      "toolbar_field": "rgba(255, 171, 61, 1)"
    }
  }
}