Help with Koleston colour mix

[Sx_warner]

Hey everyone I am a level 3 hair student who is wondering about a colour I need to use

I have a client who is currently a 5/0 and she wants to be a reddish purple colour but still brown (one of them yes) I was wondering if I mixed up 5/0 but added some 0/65 in with it what the result would be?

Thanks guys
Sam

 

[cassies97]

Why not just use 5/5 in colour touch?

 

[Sx_warner]

Why not just use 5/5 in colour touch?

She wants more of a purple colour, I was thinking 33/66 in koleston, what you thinking?

 

[cassies97]

Theres not need to use koleston over previously permanent coloured hair.

If she still wants brown 33/66 will be far too dark. 55/65 or 5/66 in ct.