The biggest decision you can make with any type of hair is dying it a brand new hue.
If you decide to add some lowlights or color within your natural hair range, you will not run into too many dilemmas. If you decide to go with a drastic hair color modification, then you may run into some problems.
Coloring hair is always risky business. When you are able to understand what may or may not happen to your colored curls, you will feel more confident about coloring your hair.