Perms and Hair Coloring

Ideally, you want to perm your hair before you color it, and you'll want to wait between chemical processes in order to let your hair return to a more normalized balance and condition. Two weeks is usually sufficient.
However, in the case of pre-colored hair and potential lightening, it's always possible to "boost" the color once again after you've gotten your perm. Talk to your stylist and ask about getting a color refresh - like a conditioning tint or soap cap - to add back what the perm took away.
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See also:
Perms
How often can I perm my colored hair?
How to make hair color last longer