Examine source code of Gray Gear (Gif)

{
  "name": "Gray Gear (Gif)",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "3.8(gray).gif"
    },
    "colors": {
      "toolbar": "rgba(33, 33, 33, 0.94)",
      "toolbar_field": "rgba(138, 138, 138, 0.96)",
      "toolbar_field_text": "rgba(26, 26, 26, 1)",
      "tab_line": "rgba(138, 138, 138, 1)",
      "frame": "rgba(51, 51, 51, 1)",
      "tab_background_text": "rgba(224, 224, 224, 1)",
      "bookmark_text": "rgba(224, 224, 224, 1)"
    }
  }
}