Why is my message white? I can't see clearly.

It should be the reason for your theme setting. You can recall whether you have changed the theme and other similar settings recently. Some theme functions are not completely optimized for SMS mode for some reasons, so SMS will be abnormal after application settings, resulting in unclear fonts. You can try changing the theme and see if the situation has changed. If not, you can restart your phone or try again once in a while, because the problem you are talking about is related to the theme interface, and setting the initial theme should solve the problem.