honestly, I'd use a line for color treated hair as opposed to a line for blondes.
I color mine blonde and I find my hair is at it's best when I pamper it.
My favorite lines are Keratase and Frederick Fekkai.
Lines for color treated hair preserve the color longer
Yes, I'll add to that by mentioning I have very thick, wavy hair that gets even more roughed-up due to the highlighting process. I smooth it out every day with a large, round brush and it's a battle. So I can get away with thicker and heavier product perhaps more than others. I need it to control frizz!Yeah, Dumb Blonde is VERY heavy unless your hair is pretty dry and porous so watch out! But it works wonders on your hair