The choice was easy.

A few strokes in on the lighter color and I put the top back on the pot. Definitely the darker one. At first I thought it was a bit dark for a baby's room, but he'll only be in there to sleep, so darker does the trick. Plus the furniture will be mostly white, which should brighten things up. It's not as dark as it looks here though. I took this pic at night and without a flash, so it doesn't actually do the color justice, but it gives you an idea. Actual painting won't start for another couple of weeks.