Examine source code of Just blue

{
  "name": "Just blue",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Snímek obrazovky (15).png"
    },
    "colors": {
      "frame": "rgba(92, 144, 255, 1)",
      "tab_background_text": "rgba(140, 140, 140, 1)",
      "toolbar": "rgba(199, 195, 224, 1)",
      "bookmark_text": "rgba(140, 140, 140, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 2, 64, 1)",
      "tab_line": "rgba(71, 71, 71, 1)"
    }
  }
}