Click on images for larger versions.
This first one is contrast of saturation. I broke a couple of rules. Is that okay?

This is just a nice desin. More of the actual class project is below it:

This is cool-warm contrast

This is Simultaneus contrast. Th brownish grey is all one color but looks different in value depending on the surrounding color.

This one is light and dark contrast of one hue:

This is contrast of hue:
