Upload any product photo to test if your background meets Amazon's strict pure white main image requirement. Detects dirty gray casts, floor shadows, and edge artifacts.
According to Amazon Style Guides: "The main image must have a pure white background (RGB 255, 255, 255). This creates a consistent search and browse experience for customers."
If your photographer uses a paper backdrop or lightbox with uneven lighting, corners often register as RGB (248, 245, 242) or (240, 240, 240). While to the human eye this looks "white", Amazon's automated image ingestion crawler detects the gray delta and suppresses your listing from search results.