Or any wrap for that matter? Baby is due to arrive in the spring so I don't want anything dark like black or chocolate. Grey and sand look nice but wondering if they get too dirty or show stains. Thinking about slate or eggplant but I'm having a hard time committing. Which color would you choose?

I like sand grey and eggplant

I would go with a neutral - grey would be really nice. Also check out the boba wraps (formally sleepy wraps).. I used a moby and then bought a sleepy wrap and immediately stopped used my moby at all because for some reason the sleepy is just way way better. Its more stretchy which makes it way easier to wrap and get tight. I have a black one and a light blue one and I use them both! My light blue didn't seem to get too dirty so I think a lighter color would work fine.

I would also go with a natural color and love eggplant or a grey color :)

Thanks for the suggestion ladies  My biggest concern with the Moby is the heat.  I hear it gets really hot wearing it.  Is the Boba wrap any more breathable? 

It's a thinner material but still t-shirt material. And honestly I had no issue with the heat. Baby wearing is hot no mattter what and after delivery you will be sweating buckets from all the hormones but I would just wear a nursing tank and the wrap and we were fine.