I'd ask your stylist since I'm sure she'll have some good info for you. One thing I've learned over the years is to not wash your hair at least 48 hours or so after having it colored. The color needs time to "oxidize" with your hair or else it will fade more quickly.
I also like to do a protein treatment + deep conditioning treatment about a week before I color.
Good luck today!
Mod-CG since December 2010.
Hair type: NC: 2A; FIA: 2cFii; Fine, normal porosity, normal elasticity
Cleansing: CJ Cleansing Conditioner, Trader Joe's Tea Tree, or Deva No Poo
Daily conditioner: Deva One C or CJ Beauticurls Strengthening Hair Cond or GPB
Styling products: Deva B'Leave In + Deva Curl Cream + AnGel; or SS CEJ + BRHG; or AG: Recoil + BRHG; or KCKT + KCCC + BRHG
Treatments: SS protein treatment or CJ Curl Fix or Nexxus Emergencee + CJ Curl Rehab