The local knitting guild I belong to sends baby hats to the NICU at a local hospital -- they have plenty of preemie hats, but not everyone who ends up in the NICU is a preemie, so they need full-term baby size as well. Every once in a while I go on a binge and knit a heap of them. All machine washable, acrylic yarns -- not my favorite, but they need to hold up to industrial laundry, and the cause is worth it. And knitting these is a little like potato chips -- you can't do just one.
I'm not a huge fan of pink for girls and blue for boys, either -- but one of the main purposes of these hats is to make life feel a little more normal for the parents who (usually) went in expecting an uneventful birth and hospital stay and now find their world tilted off axis. Even if the baby is just there for 1 day, it's a big stress -- and the normal pink or normal blue can be very reassuring.
My assortment is not entirely traditional, though (that would be a lot to ask). I'm particularly fond of the Easter egg striped ones. And look at that rogue purple (see how it's waving at you) and that dark blue one. Hmmm, just two blue hats this time - it looks like I may have to work harder at being even-handed in the next batch.