Color is the most persistent quality apparent in nature and is the strongest single influence pervading our lives from without. It is present wherever the eye can see. No visible thing is without color. Every object is seen only as a color or combination of colors and every contour and detail of every object is seen only as a color or colors. This is true even in the case of the color blind, for although their perception of HUE and CHROMA may be impaired or absent, the remaining characteristic of color, VALUE, cannot also be absent from their vision, for then they would have no vision. They would be totally blind.
The vast majority of persons are lacking in adequate color knowledge and must seek for themselves that information relating to its use and appreciation which is the inborn gift of the favoured few. But natural taste or aptitude should not be mistaken for organized fundamental knowledge: the naturally gifted cannot accurately communicate their ideas of color without a common language of color, for intelligent discussion of the subject requires mutual understanding of the terms used.
{from foreword, p. 3}

Color systems and methods of describing and classifying colors date back hundreds of years. Chevreul, the pioneer in this field, although he did excellent work, did not influence the practical users o color because his color classification was based arbitrarily on the irregularities of dye and pigment mixture, which are very difficult to retain in one’s memory. Only a method of color notation that is simple to understand and easy to remember can adequately fill the practical needs of present day color users.

The great scientist, Helmholtz, gave considerable thought to this question. He stated that color possesses three simple attributes or dimensions, which are determined directly by the eye, and which have no direct relation to dye or pigment mixtures.
...
In the late nineties, it occurred to an instructor of art, Mr. Albert H. Munsell, to utilize the possibilities opened up by Helmholtz in practical color study. Mr. Munsell decided that the best way to bring about a popular understanding of this subject was to illustrate the three dimensions of color graphically on a color sphere. He therefore planned a series of color charts presenting carefully standardized scales of HUE, VALUE, and CHROMA.
{from Preface, p. 5-6}