Blue and orange are complementary colors—opposite each other on a color wheel with 12 wedges. Complementary colors combine well (to put it mildly). Lately I’ve been noticing some especially nice orange clouds floating against blue sky, both at sunrise and sunset.
Colorful skies are not news to many of you—but I don’t live where I see the horizon often. There’s always something in the way… but every now and then we get a spectacularly showy sky!