Everyone looks better with their natural hair color
Unless they dye it an unnatural color, I think everyone except K-pop boys is much better off keeping their natural hair color.
There are no ridonkulous roots, and it doesn't get that damaged, light, frizzy look.
Almost every brunette that I see with dyed blonde hair, I imagine looking better with their natural hair color.
Natural blondes look good to me though, because they're naturally blonde.