About 16 pro max

If you purchased from an Apple Store or Apple online in the U.S., there is a 14 day return policy. See: Returns & Refunds - Shopping Help - Apple

If you purchased from an Apple Authorized Reseller, check with them for their return policy.

If you bought it directly from Apple you have 14 days to return it for a refund. You can then by one with the color you want.