Something that's neutral.
My boyfriend's beige flag is that he listens to bed time stories to fall asleep.
Beige Flags are on the same grading scale as red and green flags except this time they're not necessarily a reason stop or start dating a person. The 'beige flag' trend became popular in 2023 and became a way for users to describe their partner's traits online in a jokingly way. It also can mean the person you're describing is actually not very interesting but rather normal. There's no "the ick" when describing someone's beige flag.