Every year the hummingbirds come into the greenhouse. They must think they've hit the mother load. They spend the day, zipping in and out of the doors or open vents, and I get a chance to watch them closely and to see what plants they prefer. The myth is that they go to red flowers, and although that can be true, that is not their top priority.
Fuchsia is a favorite, but they will go to Scaevola (fan flower) even before they go to fuchsia, even though it's blue or white. I've watched them hover over the red salvia, and then go to the white salvia right next to it.