(a light/dark ashy brown/blonde)
Is this the colour you're after or the base colour?
If it's the former. I don't really understand. It's not just ashy, it's actually grey in the photos isn't it?
If it's the base colour. You're not going to get that colour. You need it much paler.
I wasn't sure if it was gray or an ashy blonde/brown, some of the photos I have it looks gray others it doesn't. My current color is platinum so the base won't be an issue.
I'm looking at it on my iPad now and they do look more silvery very ash blonde brown like you say. My PC is colour corrected, so I'm still assuming the colours are actually grey. However, as its silvery ashy blonde you want then that's fine, I just wanted to clarify as I was seeing something quite different to what you were describing π
I'm afraid I have no suggestions right now though! More natural colours just aren't my thing π