Examine source code of Acid Nebula

{
  "name": "Acid Nebula",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "X33.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(167, 182, 214, 1)",
      "toolbar": "rgba(55, 12, 71, 0.49)",
      "bookmark_text": "rgba(50, 182, 194, 1)",
      "toolbar_field": "rgba(0, 0, 0, 1)",
      "toolbar_field_text": "rgba(189, 38, 116, 1)"
    }
  }
}