Answered by Shaykh Amjad Rasheed
Is it permissible for a woman to dye her hair if her husband wants her to? Must she obey him?
Yes, it is permissible for a woman to dye her hair with henna or something like it, whether her husband permits her to or not. But if he requests this from her, it seems that she must obey him, as long as it doesn’t harm her, because the husband has a purpose in asking her to beautify herself.