"What if your [insert person] were [insert a color that isn't a natural skin color]?" That wouldn't change the person they are underneath.
That's the message of this book as babysitters are orange, teachers are red (actually, more pink than red), firefighters are purple, best friends are blue, doctors are yellow and policewomen are green. No mater what color they are, they can still be helpful and friendly. For our family, which includes multiple skin colors through adoption, it's a story that my kids live out already but is nice to have reaffirmed in book form.
My only issue was that it felt stilted because something about the flow made it seem to me like it should rhyme. I'm perfectly fine with children's book that don't rhyme, but I kept being thrown off by the cadence of this because the rhymes never came as expected. It still works, and the kids didn't mind, so this could just be a quirk of mine!