Examine source code of Modern Minimalist

{
  "name": "Modern Borderless",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Ultra 2.jpg"
    },
    "colors": {
      "frame": "rgba(41, 41, 41, 1)",
      "tab_background_text": "rgba(71, 237, 255, 1)",
      "toolbar": "rgba(41, 41, 41, 1)",
      "bookmark_text": "rgba(110, 255, 233, 1)",
      "toolbar_field": "rgba(41, 41, 41, 1)",
      "toolbar_field_text": "rgba(165, 140, 255, 1)"
    }
  }
}