Examine source code of 90s Celestial

{
  "name": "90s Celestial",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "fx_theme-90s-pattern_celestial.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0.15)",
      "bookmark_text": "rgba(76, 30, 241, 1)"
    }
  }
}