How to use Koleston 0/66 to remove yellow tones from brown hair?

[ColorNewb1234]

Colored from blonde to to brown with 5/0. However there are unwanted yellow tones to the resulting brown. Need to make it colder/ash.

Is there any way to use 0/66 purple to remove the yellow tones WITHOUT further darkening the hair beyond the 5 it's at now? Never used the special mixes before except 0/11 which I know WILL darken it further.

Thanks!

 

[ColorNewb1234]

bump

 

[ronray]

Use

Colored from blonde to to brown with 5/0. However there are unwanted yellow tones to the resulting brown. Need to make it colder/ash.

Is there any way to use 0/66 purple to remove the yellow tones WITHOUT further darkening the hair beyond the 5 it's at now? Never used the special mixes before except 0/11 which I know WILL darken it further.

Thanks!

Use 2.5g of 0/66 with 30g 6/0 with pastel.