Are you calling the tealish fabrics pictured here green, or is there another green? I love what you have pictured, but would NOT add a limey green. I know white gets dirty easily, but I like to add a bit of white to my baby quilts. It lightens up the quilt, and lends that "pure, new baby" feel to the whole thing.
I found a fabric that is white with small widely spaced pastel polka dots, and I adore it in baby quilts. It complements pink, yellow, blue, soft green, etc. So far, I have gifted three baby quilts with that fabric worked in, in small doses, and every single person has said, "Wow, I would not have thought to add white, but I LOVE it!!"
Your fabrics are all pretty much light to medium, so white would brighten the palette. Just my two cents worth...