Green paint

How many greens can there possibly be??
I was sent to the paint shop today to buy some "grass green" paint to paint a train table we are doing up at work.
And here I thought it was a simple lunchtime job >.<
Luckily, in the end I didn't have to pick because a lovely lady who was also shopping for paint offered to donate half a tin of green she has left over at home.
To the nameless lady - Thank you from the bottom of my heart :))