Quilting

I'm starting a new quilting class online on Monday the 23rd. I am very excited about it. Here is a picture of some of the material I will be using. It will be a pinwheel quilt. And I will be doing with another online blogger friend I have made, she is actually doing the class.
See here... http://cheekymama2005.blogspot.com/

I plan to buy a dark purple or blue solid color to do for the border. And I also plan to get a tan or cream color for the background.

I was wondering if anybody could give me an idea on what color thread should I use? I'm really at a loss... I was thinking a cream to go with the background color. Or possibly like a mauve color becuase that seems to go with the theme??? But I'm really not good with matching... so any ideas would be greatly appreciated.
Thanks... and wish me luck. :-)