Hi, I DIY balayage'd my hair and am quite pleased with the look- placement of the highlights etc. However the colour is brassy and I want to tone to a much cooler look. Currently my natural hair is dark brown and balayage highlights are probably a mix of level 5/6, but in a brassy coppery tone.
Does anyone know any ashy toners that would work? There used to be a good Wella colour fresh but they discontinued it. 
(I've tried blue/purple shampoo & conditioner and it does nothing).
Thanks x