Examine source code of Nightcord theme

{
  "name": "theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "theme.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(28, 25, 28, 1)",
      "bookmark_text": "rgba(195, 178, 212, 1)",
      "toolbar_field": "rgba(204, 174, 195, 1)",
      "toolbar_field_text": "rgba(53, 32, 59, 1)",
      "tab_line": "rgba(250, 230, 242, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a7c731a6-9747-40e6-8f30-42401871aed7}"
    }
  }
}