Color impressions are always subjective. There are often more differences of opinion about the color of an object than about its shape. Colors can, for example, have stimulating or calming effects, which can ultimately influence the human body. Light of certain wavelengths can also produce direct physiological effects.

A whole branch of research is dedicated to this topic and works on the biophysical foundations for these organic effects, which have been known as experiential values for a long time. Light and color are thus interconnected in various ways with life in general and with humans in particular. Some aspects of this are explored in depth in this booklet.

The book can be used both as a reference work and as a systematically readable synopsis.