False. Young open clusters do not appear blue in color. They actually appear red in color. This is because young, hot stars in open clusters emit a large amount of ultraviolet radiation, which excites the surrounding gas and causes it to emit a reddish glow. The blue color typically associated with young stars comes from hot, massive stars that are still surrounded by their birth material. As these stars age and disperse the surrounding gas, they lose their blue color and eventually become indistinguishable from the older stars in the cluster.
