How to get hair taupe brown.

[Nippysnippy]

I just can't seem to get the right tone of hairdye and want some advice. I am currently letting my grey grow in. I want to strip all the old colour out and have a very short pixie to grow my natural hair colour in. At the moment it is too red and dark so I am going to strip it. I want to match my hair which is a very cool light taupe toned brown so the transition is easier. Every colour that you can buy off the shelf is too red or dark in tone. I have tried Nice N Easy in mid cool brown but even that looks too red and dark. I don't suit blonde. Ash blonde just looks yellow/green on me. Help!!!