My hair is naturally black but recently my hair become red-ish or brown-ish I don't know why, can I apply black dye on my hair?

Question

I heard that if your hair becomes grey, do not dye your hair with black color, my hair is not grey yet, im still young, 26 years old, but my hair become red-ish or brown-ish recently while my eyebrow, mustache, and beard are having nicely dark color and i want my hair color to be the same as my other facial hair which is dark black, is that haram in Islam?

Assalamualaikum and thank you