Upload a photo, cut out the subject, and set it on gray or grey. Choose light, medium or charcoal, then download.

A gray backdrop stays out of the way, so bright and colorful products carry the image. It is the safe choice when you do not want the background to say anything.
Light gray (around #e5e7eb) is the soft studio look used by many catalogs. Medium gray (around #9ca3af) gives strong contrast to white and bright items. Charcoal (around #374151) feels moody and suits metal and tech.
Gray is the US spelling and grey is the UK and international one. They are the same colors, so the swatches and hex codes on this page work for both.
Pick any shade in the Change Background Color tool, or start from a color below. Marketplace main images usually need pure white, so use the white background tool for those.
Upload the photo, let the tool cut out the subject, then pick the gray swatch or choose any shade of gray with the color picker. Download a JPG.