Very nice!
Why the pink background, though? It makes it hard to see their arms.
You have to be careful with shading at that resolution so you don't end up with something that looks pillow-shaded. Also, as Adam mentioned, contrast, and your two brightest colors are nearly identical, so I threw one of them out. The shading on the vests confused me, so I also got rid of some details there. Danny's vest in particular makes it look as if he's wearing an additional collar. Sometimes, less is more.