Blue

Blue is one of the colors of the rainbow that people can see. It is one of the primary colors (colors that can be mixed with other colors) of light, along with red and green. Blue is the color of the Earth's sky and sea. Earth looks blue when seen from outer space by astronauts. Blue is usually associated with masculinity, harmony, conservatism, liberalism, the cold, sadness, calmness and royalty. The color blue is sometimes associated with sadness, which may be where the name of the music style The Blues comes from. Blue is a color of the Jewish religion. In Western cultures since the 1940s, blue is associated with men/boys.