Does teeth whitening solution remove tooth enamel? I want to know why my eye teeth look bad. Used trays and strips.

Absolutely not. Teeth whitening solution does not remove enamel or harm enamel. See your dentist!
Color. First, no, no enamel loss. The cuspids (eye teeth) are typically the darkest teeth in the mouth and sometimes respond less to whitening than the thinner, front teeth. We see this all the time. Talk to your dentist if it bothers you about options to make the cuspids whiter with bonding or a veneer.