Here is the scheme I came up with.
I like it, it has both light and dark features as well as warm and cool.
For the record, I was inspired by the Seattle Seahawks -Greenbay Game.
The green is a mix of Scaly Green and Dark angles green with a little bit of black added in. The color is then highlighted by adding a soft white, Americana Buttermilk to the initial color. The closest thing in GW terms would be bone white with a tiny touch of Bad moon yellow.
No one will think it looks like anything currently existing. And sadly there are so many variations of red and black for eldar it has become somewhat cliche. But if you like red & Black, then by all means ignore everything I have written
Hope it helps, one way or another