hair color and annoying reddish glow

Hi!

I'm a 37 year old male who has been trying covering grey hair with hair color products. My problem is that every time I use it (regardless of the shade of the color), my hair always turns out with the same reddish glow!!! I feel frustrated because it is immediately noticed in public. My original natural color is dark brown and I have tried from lighter brown to real black shade. It is important to point out that I always follow the instructions very closely. Please help!!!

Thanks!