Examine source code of Winter Outside In

{
  "name": "Winter Outside In",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "WinterOutsideInHcopyCustom.jpg"
    },
    "colors": {
      "frame": "rgba(231, 234, 240, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(231, 234, 240, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(231, 234, 240, 0.03)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(8, 8, 8, 1)"
    }
  }
}