curl --request GET \
  --url https://app.aegister.com/api/v1/organizations/{id}/branding \
  --header 'X-Aegister-Token: <api-key>'

{
  "error": 123,
  "messages": [
    "<string>"
  ],
  "data": {
    "custom_colors": {
      "primary": "<string>",
      "primary_hover": "<string>",
      "primary_dark": "<string>"
    }
  }
}