Green Beer? Idea's recipes?

I realize that it may be too late to make a good batch of "Green Beer" but does anyone have any good idea on how to color it or good receipts?

Thanks, Jay

Yeah... add green food coloring in the glass. Or, for a nice green Irish stout, add spinach to the mash.

-- Dave "Just a drink, a little drink, and I'll be feeling GOOooOOooOOooD!" -- Genesis, 1973-ish

P.S. I was kidding about the spinach, but if you're into that sort of thing, go for it.

I have a light IPA aging in a Conelius keg, could I pop the cover dump some food coloring in, and repressurize it?