Examine source code of Minimal Dark Design

{
  "name": "Minimal Dark Design",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "simple.png"
    },
    "colors": {
      "frame": "rgba(101, 102, 105, 1)",
      "tab_background_text": "rgba(245, 245, 245, 1)",
      "toolbar": "rgba(74, 73, 73, 1)",
      "bookmark_text": "rgba(245, 245, 245, 1)",
      "toolbar_field": "rgba(51, 50, 50, 1)",
      "toolbar_field_text": "rgba(245, 245, 245, 1)"
    }
  }
}