First zucchini coming in yellow?

First zucchini of the spring '11 crop. What's with the yellow?

Got a bet going with Mike Allen, the oldest living dude in the Donald B. Cowan Legacy Choir, that my zucchini can whoop his yellow squash.  I would not want Mike to know, but I'm a touch concerned about how my fingerlings are looking.  This first one off the vine seems to me a bit yellow.

They say that just because you're paranoid doesn't mean someone isn't out to get you.  Maybe I am concerned about this color thing simply because it has been years since I've had space to play in the dirt.  Been so long since I last saw a baby zucch, I've forgotten how to read sign!