There is no reason why you can't use 2 or even 3 different colors on the top. I would use white for the back, then white on the sashings, pink/red on the snowball blocks, brown tones for the fox...if you look at this blog, and scroll down, you can see where the quilter used different colored threads on her top...
http://christaquilts.com/2013/11/20/...ilting-part-2/