This document discusses how different colors can affect mood. It presents surveys showing most people prefer light colors over dark, and how colors like red, yellow, green and blue make people feel. Red may increase heart rate while yellow enhances concentration. Green is calming and blue is peaceful. Black can feel overpowering or sad. The document hypothesizes that color wavelengths interact with hormones to change mood, and colors evoke memories from past experiences. While reactions vary between individuals, colors generally have subtle effects on human psychology and emotion.