How long does it take for blonde highlights to fade?
The highlights will fade (shampooing will assist) however it will take time (most likely a few weeks at the least). And it will develop out, however that may take just a few months (hair grows about half an inch a month).
How do you tone down highlights in brown hair?
Full coloration merely provides coloration pigment into the hair by utilizing a developer to open up the hairs cuticle. However, some hair coloration traces use an excessive amount of ammonia of their line which, in itself, may be very damaging, as effectively. No, highlights aren’t any extra damaging.