Struggling with White hair & Roots

Hey,

So I haven't posted in here for a while, so hi everyone.

Last year I took the plunge and went white/silver, and I really love it as I never thought I would be able to get my hair this light. I am naturally very dark, and I have always had some sort of coloured hair, had purple for years!

Anyway, I am just finding that I struggle with my roots. I bleach them to the point of being pale yellow, but my toner just won't take completely, and they still remain slightly yellow. When I first took the plunge with the white, I tried both Manic Panic & Directions toners, they did absolutely nothing. I now currently use L'oreal PO1 which I really like, but I just want my hair to be all one colour. Its annoying as my hair grows so quickly, and if I tone with any natural roots the peroxide lightens them to ginger which I don't want.

I am also using various different shampoos, most recent being Brassed Off which works great on the rest of my hair, but hasn't really made a difference to my roots.

I would also love any advice on perhaps making my hair more silvery!

Thanks in advance!