Sliced Coins Quilt Along - Slicing Up

I haven't been able to devote as much time as I would have liked to cutting my coins for this quilt, due to illness. First the Dude came down with strep, on the weekend of course. The three hours we spent at urgent care exposed me to some sort of vague upper respiratory infection of sorts.
So there was no cutting, nor any sewing, for the past few days.
I managed to cut about thirty coins before the household became germ infested.

 I still need a decent amount more since I only went up to 6.5" in the biggest coins. This is barely scratching the surface of my novelty prints, though, so I'm not too worried about catching up. Sadly.
I am worried about picking a solid. I think blue would be overdoing - a lot of the prints have blue. Definitely not white or a cream - he's a little boy and little boys shouldn't have to worry that much about keeping their blankies clean. Maybe a green? Or a dark yellow?