Reflection is observable in that degree in which the surface, reflected upon, is rough or smooth. The absorbent surface allows the light to fall in and disappear and under this condition we see the true or local color. Note, for example, the effect of light on velvet or the hide of a cow in winter. When the hair points toward the light the mass is rich and dark, but when it turns away in any direction its polished surface reflects light, which like the lake becomes a mirror to it.
Light falling upon a meadow will influence it [pg 239] by its own color only in those places where the grass is turned at an angle from its rays.
From these few observations it becomes obvious that unity of tone is a simple matter when understood by the painter and that unity, being a most important part of his color scheme, may be increased by additions of objects bearing the desirable color which nature fails to supply in any particular subject. Thus if the day be one in which a warm mellow haze pervades the air, those tones of the sky repeated upon the backs of cattle, a roadway, clothing, or what not, may effect a more positive tonality than the lesser items would give which also reflect it. Herein then is the principle of Tonality: That all parts of the picture should be bound together by the dominating color or colors of the picture.
With the indoor subject the consideration is equally strong. Let the scheme be one as coloresque as the Venetian school took delight in, vivid primaries in close juxtaposition (see small reproduction in [Fundamental forms—The Cross]). The central figure, that of St. Peter is clothed in dark blue with a yellow mantle. The Virgin's dress is deep red, her mantle a blue, lighter than that of Peter's robe. Through the pillars is seen the blue sky of still lighter degree. Thus the sky enters the picture by graded approaches and focalizes upon the central figure. In like manner do the light yellow clouds repeat their color in the side of the building, in the yellow spot in the flag and the mantle of the central figure. The red of [pg 239] the Virgin's robe and the yellow mantle together form a combination of a yellow red in the flag, the blue and red of the central figures become purple and garnet in the surplices of the kneeling churchmen and doges. The repetition of a given color in different parts of the figure is pushed still further in the blue gray hair of the kneeling figures, the red brown tunics of the monks and the yellow bands upon the draperies.
In the [picture by Henry Ranger] (the crossing of horizontals effected without a line), a canvas in which the color is particularly reserved and gray, the tone is created by precisely the same means. The cool gray and warm white clouds are reflected into the water and concentrated with greater force in the pool in the foreground, the greens and drabs of the bushes being strikingly modified by both of the tones noted in the sky. In landscape a cumulative force may be given the progress of the sky tones by the use of figures, the blue or gray of the sky being brought down in stronger degree upon the clothing of the peasant, his cart or farm utensils. Just here inharmony easily insinuates itself through the introduction of elements having no antiphonal connection.
Fancy a single spot of red without its echo. Our sense of tonal harmony is unconsciously active when between two figures observed too far away for sight of their faces we quickly make our conclusions concerning their social station, if one be arrayed in a hat trimmed with purple [pg 241] and green, a garnet waist and a buff skirt, while the other, though dressed in strong colors expresses the principles of coloration herewith defined. The purple and green hat may belong to her suit if their colors be repeated by modification, in it; or the garnet and buff become the foundation for unity if developed throughout the rest of the costume.
The purchaser of a picture may be sure of the tone of his new acquisition if he will hang it for a day or two upside down. This is one of the simplest tests applied by artists, and many things are revealed thereby. Form is lost and the only other thing remains—color.
Harmony being dependent only on the interrelations of colors, their degree or intensity are immaterial.
On this basis it is a matter of choice whether our preference be for the coloresque or the more sober art.
It must however be borne in mind that the danger lies in the direction of color. Inharmony is more frequently found here than in the picture of sober tone.