Examine source code of Material Light Gray

{
  "name": "Material Gray",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1.png"
    },
    "colors": {
      "frame": "rgba(56, 56, 56, 1)",
      "tab_background_text": "rgba(223, 223, 223, 1)",
      "toolbar": "rgba(40, 40, 40, 1)",
      "bookmark_text": "rgba(223, 223, 223, 1)"
    }
  }
}