what age are you?
My friend (30) was wearing green eyeshadow etc the other day and looked fab - I bought the same stuff (I'm 38) - and it looked horrible on me!
Practice putting it on now - so if it doesn't look right you can get it all off on time.
Have you got fake tan as I think the greens look best on tanned skin.
Also - if its for night time - maybe too subtle? I think the greens are better for the daytime??