Examine source code of Winter (simple)

{
  "name": "Winter (simple)",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Screen Shot 2019-12-12 at 4.58.04 PM.png"
    },
    "colors": {
      "frame": "rgba(97, 147, 255, 1)",
      "tab_background_text": "rgba(169, 211, 245, 1)",
      "toolbar": "rgba(169, 211, 245, 1)",
      "bookmark_text": "rgba(25, 79, 179, 1)",
      "toolbar_field_text": "rgba(36, 182, 255, 1)"
    }
  }
}