USA background rules and shadow control

[TrevorPlay]

Which background colors are acceptable for a USA passport photo taken online, and what simple steps remove banding, gradients, and head shadows so the image looks clean and passes review the first time?

[Lololoshka]

USA requires a plain white or off-white background with even tone and no shadows. Face the light, keep some distance from the wall, and verify smoothness. Create and confirm a clean USA background at passport-photos.net/