Hey all! I dyed my hair with Alfaparf Evolution of the Color 11.11 with a 20 developer. I want to get highlights later in the summer so feel this base color is too light.
I want to go down to AEC 10.11 but don't know if I should apply it with 10 or 20 developer.
My natural base is very dark brown and need to use ash tones to avoid brassiness. I love the blonde but it's too light for the coming summer and highlights. I was advised to apply 10.11 with 10 developer to bring it down one tone but want to make sure.