You can include a swatch in your options by customizing the option style.

1. From your FastCommerce admin, go to Products.
2. Click on the product name to view the product details.
3. In the Options section, click Configure Option Style.
4. In the window that appears, choose Swatch from the drop-down list.
5. To add a swatch, you can use a hex color code, upload an image, or select a variant image.
6. To apply the swatch to all products, tick the box next to the option.(Optional)
7. Click Save.
8. To save your changes, click Save in the upper right corner of the page.