curl --request GET \
  --url https://formhug.ai/api/v1/forms/{form_token}/theme \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "header": {
      "images": [
        {
          "url": "<string>",
          "id": "<string>"
        }
      ]
    },
    "wallpaper": {
      "color": "<string>"
    },
    "primary_color": "<string>",
    "submit_button": {
      "style": {
        "background_color": "<string>",
        "color": "<string>"
      }
    },
    "typography": {
      "form_header": {
        "color": "<string>"
      },
      "field_label": {
        "color": "<string>"
      },
      "choice_style": {
        "color": "<string>"
      }
    },
    "general_button": {
      "color": "<string>",
      "border_color": "<string>"
    },
    "form_container": {
      "style": {
        "background_color": "<string>"
      }
    }
  }
}