Sandy Dumont is an image consultant in Norfolk, Virginia. She writes on NPR.org: ... Blue is trust, that's why policemen wear navy blue. They don't wear baby blue however, because the darker the color the higher the authority. Baby blue is for putting babies to sleep.
Pantone wanted $9.99 for their iPhone app, which is more than I was willing to pay (especially considering that Motion X's GPS with turn by turn directions was only $2.99 and I used it way more than the once I anticipated using Pantone) so this isn't official, but I'm pretty sure my letter carrier uniform shirt is baby blue.