MSM: Color code the header bar (or UX) for each site

I don’t use MSM a lot, but when I do, I’ll often load up several tabs of the EE interface to populate the skeleton of the 2nd site’s templates.

In doing so, I realize I often can get lost: “Which site am I editing?”

I could see this rearing its ugly head during routine maintenance.

I could also just be more careful. But I don’t see that happening. =)