It could be chromatic aberration. Does it happen in all your pictures? If so you may have a faulty lens. chromatic aberrations happen when the lens fails to focus all the colors to a single convergence point and you get green or red color fringes. It is real easy for it to show on highlight areas, so like this snow picture that's all highlights basically. I would take it in to the store or test it against a friends if you can. If you can get the colors to show on yours but not on a different Droid then your lens is probably faulty, like it probably has astigmatism or something like an eye would. If your lens has imperfections it would throw off the light wavelengths and they would have different focal points. I doubt the there's the processing step to help remove or reduce these like Nikon DSLR and Panasonic Lumix cameras have. I don't have this problem in my pictures, and it doesn't snow where I live so I can't test that, but I would test it against other Droids. It seems to me you might need a replacement.
If you want I can upload some pics from my phone that you can use as a reference with comparable shots from yours.