The visibility is subject to the combination of colors. It is very much relative. Each color has the potential to become attractive and visible based on other colors. The above (plate 1 A&B) shows the degree of visibility due to the contrasting colors. ‘Black on Yellow’ has the highest visibility because of the intensity of the yellow color. Similarly the visibilities of alphabets are based on the size and distance of the matter. The font sizes are to be increased based the distance of viewing point.
