As a family member and an advocate, one of the pleasantest things I've seen lately is the lack of uniforms of any kind in a few innovative homes.  To me, the elimination of uniforms says "home".   It graphically removes a "hospital environment" flag.  Could you give them a clothing allowance instead?  Or, have them hand in individual orders from a regular clothing catalog featuring washable apparel?

Another idea that I heard in one of our discussion groups was going to tan pants and any kind of shirt that had one of the company "colors" in it.  Sorry, I don't remember either the "company" or the colors.  It's a good alternative but, for me and mine, we favor doing away with uniforms entirely.