Examine source code of Batman Emblem - Brown

{
  "name": "Batman Emblem - Brown",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "batman-logo-250x111.png"
    },
    "colors": {
      "frame": "rgb(125, 115, 120)",
      "tab_background_text": "rgb(237, 237, 217)",
      "toolbar": "rgb(11, 12, 9)",
      "bookmark_text": "rgb(168, 115, 63)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(124, 147, 184)"
    }
  }
}