The symbolism behind the colors of a Rubik’s cube
Blue is a primary color across all models of color space. It is the color of the ocean and the sky; it often symbolizes serenity, stability, inspiration, wisdom or health. It can be a calming color, and symbolize reliability. In the Catholic Church, the Virgin Mary is most often depicted wearing blue, to symbolize being "full of grace" by divine favor. Blue is widely used for baby boys' clothes or bedrooms, although the reason blue is so strongly associated with boys is debated. Blue can also mean sadness in most cultures. It can also be associated with life.
Orange is a primary color in many models of color space, and a secondary in all others. It is the color of social communication and optimism. From a negative color meaning it is also a sign of pessimism and superficiality.
Red is a primary color across all models of color space. It is often associated with love, passion, and lust but also danger. It is frequently used in relation to Valentine's Day. It can also be used to signify danger or warning but it is also associated with importance. For instance, it is used for stop signs and fire engines. In China, red is often used to symbolize good luck or happiness, and is used for many holidays or weddings
White is a primary color across all models of color space. It most often symbolizes perfection, faith, innocence, softness, and cleanliness. Brides often wear white dresses to symbolize purity.
Green is a primary color in many models of color space, and a secondary in all others. It is most often used to represent nature, healing, health, youth, or fertility, since it is such a dominant color in nature. It can be a very relaxing color but is also used in the US to symbolize money, greed, sickness or jealousy. Saying that someone is "green" means they are inexperienced or new.
Yellow is a primary color in many models of color space, and a secondary in all others. It is a color often associated with sunshine or joy. It is sometimes used in association with cowardice or fear, i.e., the phrase "yellow-bellied". Children tend to like this color, and it is used to market products to children; it is also used for school buses and taxi cabs since it is such a bright, noticeable color.