I couldn't bear my brassy grown out highlights much longer and decided to dye my hair my natural colour before Christmas.
Taking the advice that my highlights would go khaki coloured if I went straight to a brown dye, I opted for a reddy brown colour, with the idea that once the blonde was filled in with some red tones, I could dye brown over the top.
Well, the colour was 2 shades darker than I ought to have done. And it's very red/mahogany rather than brown. It's ageing and just horrible with the length of hair I have. I tried dyeing brown over the top and it made no difference, but again, it was a warm brown and might have had red tones in it.
I have an Ash brown dye in my drawer, s it even worth trying that? It's a lighter shade than the original dye.
Also, the original dye is one due to last 24 washes. I read that they are not truly semi-permanent. As it washes out, what will be revealed first, my root colour or the colour on the highlights?