Color can impact people both physically and psychologically. It is important to use color appropriately to create visual comfort, aesthetic appeal, material protection, and safety. For classrooms, bright or varied colors that are within a child's eye level should be avoided as they can be distracting. Light colors on walls and ceilings are recommended, with slight contrast between chalkboards and surrounding walls. Safety signage should use standardized colors like red for fire hazards, green for safety, white as guides, orange for alerts, blue for precautions, and yellow with dark bands for warnings.