d into ten steps, but they may be subdivided
much finer, if desired, by use of the decimal point. It is a question of
convenience whether to make a small score with only the large divisions,
or a much larger score with a hundred times as many steps. In the
latter case each hue has ten steps, the middle step of green being
distinguished as 5G-5/5 to suggest the four steps 1G, 2G, 3G, 4G, which
precede it, and 6G, 7G, 8G, and 9G, which follow it toward blue-green.

[Illustration: Fig. 23.
COLOR SCORE--(or No. 6 in Plate III)--GIVING AREAS BY H, V AND C.]

+The score preserves color records in a convenient shape.+

Such a color score, or notation diagram, to be made small or large as
the case demands, offers a very convenient means for recording color
combinations, when pigments are not at hand.

[Illustration: Fig. 24.]

(141) To display its three dimensions, a little model can be made with
three visiting cards, so placed as to present their mutual intersection
at right angles (Fig. 24).

5G 5/5 is their centre of mutual balance. A central plane separates all
colors into two contrasted fields. To the right are all warm colors, to
the left are all cool colors. Each of these fields is again divided by
the plane of the equator into lighter colors above and darker colors
below. These four color fields are again subdivided by a transverse
plane through 5G 5/5 into strong colors in front and weak colors beyond
or behind it.

(142) Any color group, whose record must all be written to the right of
the centre, is warm, because red and yellow are dominant. One to the
left of the centre must be cool, because it is dominated by blue.
A group written all above the centre must have light in excess, while
one written entirely below is dark to excess. Finally, a score written
all in front of the centre represents only strong chromas, while one
written behind it contains only weak chromas. From this we gather that a
balanced composition of color preserves some sort of equilibrium,
uniting degrees of warm and cool, of light and dark, and of weak and
strong, which is made at once apparent by the dots on the score.

(143) A single color, like that of a violet, a rose, or a buttercup,
appears as a dot on the score, with a numeral added for its chroma.
A parti-colored flower, such as a nasturtium, is shown by two dots with
their chromas, and a bunch of red and yellow flowers will give by their
dots a color passage, or "silhoue