Finally, color perception can also be explained physiologically: Red is the color that babies can recognize first. The preference therefore often goes down to the basic school age. Red is the color of love, but it also symbolizes anger and danger. The origin of this perception lies literally in the blood, which was previously only visible in dangerous situations. Red is therefore also considered an aggressive color. The fact that many Germans prefer blue also has physiological reasons: the perception of the color of the sea requires the least amount of work to the eye.