Examine source code of Spectral Spiral

{
  "name": "Spectral Spiral",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "C1.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 0)",
      "tab_background_text": "rgba(217, 13, 149, 1)",
      "toolbar": "rgba(54, 0, 112, 0.49)",
      "bookmark_text": "rgba(129, 194, 0, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(0, 209, 185, 1)"
    }
  }
}