Examine source code of Hyper Light Drifter

{
  "name": "Hyper Light Drifter",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0)",
      "toolbar_field": "rgba(112, 87, 100, 1)",
      "toolbar_field_text": "rgba(255, 184, 51, 1)",
      "frame": "rgba(255, 0, 0, 1)",
      "tab_background_text": "#ffffff",
      "bookmark_text": "rgba(64, 255, 166, 1)"
    }
  }
}