They like red things, but not exclusively! And they're flying here soon -traditionally right after Spring Break. The hummingbird products (feeders etc.) seem to rely on the color red. Hummingbirds are attracted by red, certainly, but no more or less than any other bright color. Yellow, white, neon blue - any color but green. They’ve evolved this way so they can differentiate the brightly-colored flowers (where their food is) from the sea of green leaves.
A friend sent me the link below, where you see several well-camouflaged owls (maybe you won't see them). Try it!