Hi, after many years of using Tints of Nature permanent colour successfully I've now found my hair isn't accepting colour in particular grey isn't taking at all. I don't want to switch to ammonia colour as it's damaged my hair previously. I tried growing the colour out to go natural but it looks awful, I hate my natural colour it's very ash mousy/mid brown and I have a small amount of grey about ten percent.it just makes me look washed out. So im putting a slightly darker warmer brown on it. Has anyone else used an ammonia free colour that's successfully covered grey hair? Ideally a permanent colour. Mine is not really taking on my natural hair much either. My hair is not damaged, I've not coloured it for a year before now and it's cut regularly. Im wondering if it is hormonal thing that it's stopped working as I'm 52 and on HRT patches.