Does anyone know if such a thing exists. My hair is medium/dark brown, straight, fine, dry, porous and brittle so I only dare use something natural and non permanent on it. I have grey strands dotted throughout but no really noticeable (i don’t think). Ideally I’d like something ready mixed if there is such a thing. I’ve not coloured it for at least 15 years so am guessing things have moved on in the colouring world. Has anyone got any recommendations please. I’m wanting a rich chocolate brown with no red.