I personally cannot get enough of Duotones and Transformer Shades, one of my favourites has to be the red to red-pink with green to teal shift range. This means Lounge, Bloodstone, Solstice, Radiate, Fortune Teller, Golden Hour and V.R. just to name the Urban Decay's eyeshadow versions. For a non-UD version MAC has Starry Night.
The most common combo I personally use is Lounge and Solstice, heavy on Lounge or slight on Lounge, blending out or filling in with Solstice; for bold to ultra glittery looks. I also sometimes use with Relish for more red. My eyes are Green/Blue/Grey and these shades helps the green dominate.
When I want to create a nude and subtle version I use pinkish or taupe-ish nudes like Laced, Hacked or Tease with a Lucid transformer shade halo.
These type of looks I highly recommend for anyone who has green eyes or is ready to venture into this shade range, duotones or transformer shades.
