Igora Royal Slate grey mixed with Affinage infiniti Silver?


New Member
Hiya my hair is a lightest base i physically can get it has white tones but bits of light blonde in it, i wanted to go to a slate grey that would fade eventually, i’m a bit worried of using the slate grey by itself as i’ve heard it turns hair black and that’s the last thing i want!
Would mixing silver and slate grey together make a nice dark grey that would fade out back into my blonde?
any input would be good thank you