You can spend hours playing around with Kuler. This is not wasted time if it helps you see how adjusting hue, value, and saturation creates color harmonies. For actual presentation themes, keep the number of different hues to a minimum. The mantra is to always use color for a reason and with restraint. To teach yourself more about how colors can work together, however, it’s OK to go a little wild sometimes. Kuler has a great community and it’s a wonderful online tool from which to learn.
