Color has significant psychological effects and is used strategically in marketing, design, and other contexts. Certain colors like red, black and white carry strong symbolic meanings that influence human behavior and perceptions. In literature like Othello, color imagery contributes to major themes through metaphor and associations with ideas like race, good/evil, and sexuality. Color psychology is also applied in schools, prisons, and other settings to manipulate moods and behaviors. Cultural interpretations of color can vary significantly between societies.