So I think the time has come to dye my hair. I've got quite a lot of thick dark brown hair, with reddish/coppery tones, and a fair amount of grey coming through. I want to keep my natural colour but cover the grey, so I'm wondering if I should go for a lighter colour, like maybe a dark blonde? I'm thinking it will dye the grey without having any effect on the rest of my hair, and make it look like I have lovely highlights. Does this sound sensible? I'm talking about DIY with a box dye - can't afford hairdresser. Thanks for your help!