Colour application advice

[kellylill]

I have a client wanting this picture and just wondering what's the best way to apply colour?
She is naturally a base 6 with grown out blonde highlights. I'm wondering whether it's possible to apply the colour in one go, by applying the global colour to the roots first then going through and adding the balayage pieces somehow. Or do I need to apply base colour, wash off and balayage?
Thanks

 

[kellylill]

Anybody?
I'm thinking it's going to be easier to apply the base colour, wash and dry then balayage. I'm just uneasy with putting a colour on to then lift it out again.

 

[LoveCaroline]

I'd do the roots then go through and balayage.

 

[kellylill]

Altogether? That's what I normally do when I'm doing a normal balayage where just the roots need darkening/touching up. But I need to take the base colour all the way through.

 

[Nicky G]

Could you foil your balayage and then go right through with colour?

 

[LoveCaroline]

Yeah, so same thing but just take through the darker parts and leave out/lighten what needs to be lighter.