if i want to change the color of my new iphone 11 what i have to it

Hey there, Mdbilal23!

Thanks for reaching out to the Apple Support Communities! It sounds like you purchased a new iPhone and want to exchange it for a different color. If you purchased the iPhone directly from Apple, you'll need to check out this article for Returns & Refunds:

"Exchange an item

If you purchased your item from Apple in the U.S., you can take it to any U.S. Apple Store for an exchange. Item exchanges are, of course, subject to in-store product availability. It's a good idea to check in-stock availability by calling the Apple Store, or by viewing the product on apple.com to see if the item is available for pick up locally. Personalized items and custom-configured Macs may not be eligible for exchange at an Apple Store.

Items ordered online from Apple that arrived damaged or are incorrect can be returned to any U.S. Apple Store, or by contacting Customer Service at 1-800-676-2775."

If you purchased the iPhone from a third party, you'll need to reach out directly to them for their exchange policies.

Thanks for the excellent question and have a terrific day!