We always recommend you do a sensitivity test before coloring your hair 48 hours before coloring. 24 hours in advance, wash your hair. The day after you shampoo is the best for coloring. Make sure you have everything you need. We recommend: an old towel (just in-case) , hair clips or ties (helpful for sectioning), wide-tooth comb (to pull color through) , old button down shirt or smock (a nice security measure against any mess). See our accessories here.
If this is your first time coloring with a shade, we recommend you do a strand test.