Yellow being a primary color has a lot of meanings. It can represent optimism, joy, and humor, but it can also represent duplicity, cowardice, and betrayal. The hex code for the color yellow is #F00. Yellow has an interesting history. According to Color Psychology, from the 14th century onwards the color yellow has been tied to negative personality traits and became one the least popular shades.
According to Dunn Edwards Paints, when on the color wheel yellow is considered a warm hue and sits between red and orange. When creating different shades of yellow from light, medium, and dark, light yellows are usually created with white and darker shades are mixed with black.
According to Very Well Mind, the color yellow can evoke strong feelings because it is such a bright and intense color. Yellow can definitely be an attention grabber, but if overused can become overstimulating.