Since the Debbie Bliss Maya in which I've knit the body is discontinued, and would probably be too chunky for the crocheted edging anyway, this was always going to be a fun match; but I think 1 strand Patons Diploma Gold in a very dark, heavy green and one strand of Cygnet Wool Rich 4 ply in a lighter, khaki-er green held together will do. The DK is thicker than the 4-ply, which sort of means they match the balance of colours in the body, and it all seems to work OK together. I was originally planning to ply the two yarns together, but I think I'll see how just holding them works; I'm thinking it will look less regular that way, which I like.
Photos later, as I'm at work now, and though I do have my camera, I'm not photographing yarn (or the completed sleeve that was brought along as colour comparison) in the workplace.
Patons diploma gold, dark green: 100 g, 240 m
Cygnet wool rich 4ply, sagey khaki: 50 g, 205 m
Oh, and Mary?? You can quit feeling guilty about using some of my green Maya; it is indeed the same yarn, but I had plenty to finish with and enough for seaming up, too. And I don't think I'd have had enough to crochet the edging in this stuff even with that smidge - even if I'd wanted to!
ETA: The picture.