Brilliant red is good for commanding attention. In its crimson tone it benefits those who worry and are fearful. Its vermilion shade will help to counteract depression and help to inspire action to solve the problem. The most easily recognized and identified color and the easiest to see in daylight conditions. A bright red attracts attention to itself and will take a lot of dirt without losing its appearance.
Yellowish reds have better visibility than bluish reds.
Reds tend to 'disappear' in a dim light. Angry, thirsty, mean, sore eyes, fire, danger. Red is the principal color pertaining to areas of basic needs, such as food, clothing and shelter. Red has always been attractive to human beings. The early people of North Africa and Asia Minor, including the Egyptians, considered themselves to be a red race.