The simplest element of visual experience is of course found in light and color, the sensation of the eye as such. Yet there is no branch of aesthetic which is so incomplete. We know that the sensation of light or color, if not too weak or too violent, is in itself pleasing. The bright, the glittering, shining object, so long as it is not painful, is pleasantly stimulating. Gems, tinsel, lacquer, polish, testify to this taste, from the most primitive to the most civilized man. Color, too, if distinct, not over-bright, nor too much extended in field, is in itself pleasing.
The single colors have been the object of comparatively little study. Experiment seems to show that the colors containing most brightness-white, red, and yellow-are preferred. Baldwin, in his "dynamogenic" experiments,<1> based on "the view that the infant's hand movements in reaching or grasping are the best index of the kind and intensity of its sensory experiences," finds that the colors range themselves in order of attractiveness, blue, white, red, green, brown. Further corrections lay more emphasis upon the white. Yellow was not included in the experiments. Cohn's results, which show a relative dislike of yellow, are contradicted by other observers, notably Major and Baker,<2> and (unpublished) experiments of my own, including the aesthetic preferences of seven or eight different sets of students at Radcliffe and Wellesley colleges. Experiments of this kind are particularly difficult, inasmuch as the material, usually colored paper, varies considerably from the spectral color, and differences in saturation, hue, and brightness make great differences in the results, while the feeling-tone of association, individual or racial, very often intrudes. But other things being equal, the bright, the clear, the saturated color is relatively more pleasing, and white, red, and yellow seem especially preferred.
<1> Mental Development in the Child and the Race, 1895, pp. 39, 50, ff. <2> E. S. Baker, Univ. of Toronto Studies, Psychol. Series, No. 4; J. Cohn, Philos. Studien, vol. X; Major, Amer. Jour. of Psychol., vol. vii.
Now, according to the Hering theory of color, white, red, and yellow are the so-called "dissimilating" colors in the three pairs, white-black, red-green, and yellow-blue, corresponding to three hypothetical visual substances in the retina. These substances, that is, in undergoing a kind of chemical disintegration under the action of light-rays, are supposed to give the sensations white, red, or yellow respectively, and in renewing themselves again to give the sensations of black, green, and blue. The dissimilating process seems to bring about stronger reactions on the physiological side, as if it were a more exciting process. Thus it is found<1> that as measured by the increase in strength of the hand grip under the stimulation of the respective colors, red has particularly exciting qualities, but the other colors have an analogous effect, lessening, however, with the descent from red to violet. The pleasure in bright red, or yellow, for instance, may thus well be the feeling-tone arising in the purely physiological effect of the color. If red works like a trumpet call, while blue calms and cools, and if red is preferred to blue, it is because a sharp stimulation is so felt, and so preferred.
<1> Ch. Fere, Sensation et Mouvement, 1887, p. 80.
The question of the demands of the eye in color combination is still more complicated. It has been traditional to consider the complementaries black-white, red-green, blue-yellow, and the other pairs resulting from the mixtures of these as the best combinations. The physiological explanation is of course found in the relief and refreshment to the organs in successive alternation of the processes of assimilation and dissimilation, and objectively in the reinforcement, through this stronger functioning of the retina, of the complementary colors themselves. This tendency to mutual aid is shown in the familiar experiment of fixating for some moments a colored object, say red, and then transferring the gaze to a white or gray expanse. The image of the object appears thereon in the complementary green. Per contra, the most complete lack of contrast makes the most unpleasing combination, because instead of a refreshing alternation of processes in the retina, a fatiguing repetition results. Red and orange (red-yellow), or red and purple (red-blue), successively stimulate the red- process with most evil effect.