My iPhone case has a blue tint?

This just appeared on my iPhone 6 clear case and i don't know how it got there and it won't wash off or anything! How do I get rid of it? My iPhone case has a blue tint

If you put your phone in your jeans pocket, it's dye from your jeans. I don't know how to remove it. You might try lightly spraying a little hairspray on a clean cloth or white paper towel and gently dabbing the blue spots. Hairspray removes ink so it might help. Just dab, don't wipe because that might smear it and make it worse. Other than that, I really don't know what else might work. Make sure you only dab the case, not any part of the phone that is exposed.