If you do a color changing deck routine... don't try to improve it by having the box change. You don't make an effect better by adding a kicker that isn't as impressive as the ending of the underlying effect. More isn't necessarily better.
If you want, put the box in a pocket or a case after you take the cards out. After you are done, take a different color box out of a pocket or a case and put the cards away. Say nothing. Don't make a trick out of it. See if anyone notices.