I'm working on one right now for a Juvenile Diabetes Research Foundation fundraiser. It's a simple disappearing 4-patch with bright, bold colours and geometrics. I was looking for something bright and cheery.
The JDRF doesn't have a logo or theme to incorporate into the pattern ... for an autism event I'd do a puzzle quilt :)
Orange is one of the main colours in this one - bright blues, vibrant greens and glorious orange.