Examine source code of minimalistic white

{
  "name": "minimalistic white",
  "manifest_version": 2,
  "version": "3.8",
  "theme": {
    "images": {
      "theme_frame": "Rectangle.png"
    },
    "colors": {
      "frame": "rgba(230, 238, 245, 1)",
      "tab_background_text": "rgba(69, 69, 69, 1)",
      "toolbar": "rgba(250, 250, 250, 1)",
      "bookmark_text": "rgba(20, 36, 41, 1)",
      "toolbar_field": "rgba(240, 243, 245, 1)",
      "toolbar_field_text": "rgba(69, 69, 69, 1)",
      "tab_line": "rgba(0, 114, 255, 1)"
    }
  }
}