While camping, I noticed that if you look long enough at almost any star, you start seeing some tiny, subtle colors in that star. Even crazier, they sometimes flicker between more colors. In my case orange, blue and something like cyan.
Besides constellations, what else could you observe regarding starts, with the naked eye?
Check out Albereo. Super easy to spot in the summer in the northern hemisphere. Tip of Cygnus’s tail. Two stars with strikingly different colors. Should be able to separate them with a decent set of binoculars. Yellow and blue.