re: Neither one size nor one color fits all
In winter, a black roof would radiate more heat at night as well as absorb more in the day, but it would also help keep snow (very white, reflective stuff, but also a good insulator) from accumulating on the roof, so clearly it works both ways. But in winter, there isn't that much solar energy available to be absorbed in the first place. It would not be a simple analysis in temperate climates.
Still, in Florida, it's a no-brainer. Anything but a white roof here is lunacy.