I agree with aimless6poet. That is my understanding also - that using protein too soon after you color will fade the color.

It's good to use it in advance.

Hi PerriP! Glad you have emerged from lurkdom.
2/c-3a Coarse hair med. density.
Protein sensitive but can use occasionally
Highly porous. Color over grey.
Best 1st day method: Ice Queen!
Stylers: Mix Curls in a Bottle into everything for shine. Terrible pj
Sometimes try roller sets or use a curling brush - classic glamor.
Every day is a gift