There are three steps you need to follow to create a banner for your product image:
1. Assuming the product is already created, else Create ( Add ) the product [Admin: Add Product]
2. Add your banner text - Note: Circa 14 only characters can be added.
3. Enter the hexadecimal colour code if you have one, alternatively click on the "Need a colour picker" link, and choose your colour from the palette.
Tip: Banner text is always white, so remember to choose a background colour that does not cause an ilegibility issue.