Examine source code of mein 1. theme

{
  "name": "mein 1. theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot_2021-03-08 Theme erstellen Entwickler-Zentrum Add-ons für Firefox.png"
    },
    "colors": {
      "frame": "rgba(255, 0, 0, 1)",
      "tab_background_text": "rgba(255, 136, 0, 1)",
      "toolbar": "rgba(255, 208, 0, 1)",
      "bookmark_text": "rgba(26, 255, 0, 1)",
      "toolbar_field": "rgba(0, 200, 255, 1)",
      "toolbar_field_text": "rgba(4, 0, 255, 1)"
    }
  }
}