I use alot of darks. They are great with a really light and then use them in half square triangles. Flying Geese or Ohio Star are two of my favorites. Anything that uses HSTs works well. Jacob's Ladder or a Bear's Paw would be good too.
Here are examples of my work and you can see what I mean
http://www.quiltingboard.com/t-28088-1.htm
http://www.quiltingboard.com/t-18069-1.htm