Color psychology in interior design influences mood, emotions, and overall human behavior within a space. Warm colors like red and orange can stimulate energy, appetite, and social interaction. Cool tones such as blue and green promote calmness, focus, and relaxation, often used in bedrooms or offices. Neutral colors like beige, gray, and white create balance and serve as a backdrop for accent tones. Yellow is associated with optimism and creativity, making it effective in kitchens and collaborative spaces. Darker shades can convey sophistication but may also create feelings of heaviness if overused. Strategic use of color enhances functionality, aligning interior spaces with the psychological needs of occupants.