Call me Captain Obvious but Nice Vice under purples is so amazing. I also like to use Black Ground paint pot. Entremauve pigment in the crease also does amazing things for a purple look. I love pairing purples and teals/greens as well especially Parrot + Shimmermoss + Nocturnelle on the lid with Entremauve + a tiny bit of Black Tied in the crease. <3 it!