Cryptic coloration

“ They are at once less definite and less generally evident, but more delightful—more frequent in nature, though rarer in common art, than the like relations of the secondaries and primaries. There is very little pure colour in the world: now and then a gleam dazzles us, like a burst of sunshine through grey mists; but as a rule, nature prefers broken colours to absolute hues. Most pure in spring, most full in summer, most mellow in autumn, [312] most sober in winter, her tints and shades of colour are always more or less interlaced, from white and the primaries to the semi-neutral and black. ”

“ When we use these as pigments, we must remember that the pigment particles have a certain degree of transparency so that light partly penetrates them, certain rays being then reflected and certain absorbed according to the hue. A blue pigment, for example, absorbs all constituent rays of white light except the blue and the hues which border on blue in the spectrum, it being impossible to procure pigments which are so pure that they do not let some other hues besides their own characteristic one pass through them. ”

“ We must expect, then, in painting, to find that neutral gray will be more altered by pale tints of red, orange, or yellow, which are slightly lighter than itself, and that the gray will be less altered by these colors when differing considerably from it in luminosity; analogous conclusions with regard to green, blue, violet, and purple, can also be drawn. Saturated or intense colors in a painting have less effect on white or gray than colors that are pale; this was shown in the preliminary experiment when gray was placed on a ground of strong color. ”

“ The great importance of transparent pigments is to unite with solid or opaque colours of their own hues, giving tone and atmosphere generally, together with beauty and life; to convert primary into secondary, and secondary into tertiary colours, with brilliancy; to deepen and enrich dark colours and shadows, and to impart force and tone to black itself. ”

“ There is no difference in the quality of these colours, except as affected by texture. You will constantly hear lights and shades spoken of as if these were different in their nature, and to be painted in different ways. But every light is a shadow compared to higher lights, till we reach the brightness of the sun; and every shadow is a light compared to lower shadows, till we reach the darkness of night.
Every colour used in painting, except pure white and black, is therefore a light and shade at the same time. ”

“ The sun's own light shows under this method of spectroscopic analysis millions of tints, in fact I might say millions of red tints, and so forth, right through the spectral list of colours. But also many thousands of tints are wanting. Imagine a rainbow-coloured ribbon, the colours ranged along its length, so that the ribbon is black at both ends, and that from the black of one end the colour merges into very deep red, and thence by insensible gradations through orange, yellow, green, blue, indigo, and violet, into the black of the other end. ”

“ The Three Primitive Colours, by the endless varieties of their solvents, regulate, more or less, the whole economy of a picture; and the abundant stores of nature are faithfully imitated by their agency. Thus, the Primitives being red, blue, and yellow, the colours produced by their combination are purple, orange, and green; these, in their turn, may be extended to every tint that exists. The junction of the Three Primitives absorb all, and form neutral tint, which, by the addition of quantity, produces black. ”

“ Unfortunately, no pigments have been found that can reproduce in purity the colors of the spectrum, and to this fact is due the failure of the process to reproduce exactly all the colors, tints, and shades of an original. When a drawing in black on white paper is photographed only the white paper affects the negative film. The transparent parts of the developed negative thus represent the black, and the opaque parts, which have been acted upon by light, represent the whits. ”

“ It is important that the words which we use for the different colors should be well understood, that in using them we use them with the same meanings. By Red I mean the only positive color which shows no element either of Yellow or of Blue. It is the color which we often describe by the word crimson, and we produce it by the mixture of Rose Madder and Vermilion. By Yellow I mean the only positive color which shows no element either of Red or Blue. It is the color of the primrose which may be produced by the pigment Aureolin. ”

“ Experiments with variable masks for the selection of color intervals, such as have been described, soon stimulate the imagination, so that it conceives sequences through any part of the color solid. The color image becomes a permanent mental adjunct. Five middle colors, tempered with white and black, permit us to devise the greatest variety of sequences, some light, others dark, some combining small difference of chroma with large difference of hue, others uniting large intervals of chroma with small intervals of hue, and so on through a well-nigh inexhaustible series. ”

“ Spectral analysis shows that no pigment is a pure example of the dominant hue which it sends to the eye. Take, for example, the very chromatic pigments representing red and green, such as vermilion and emerald green. If each emitted a single pure hue free from trace of any other hue, then their mixture would appear yellow, as when spectral red and green unite. ”

“ Experiment shows that all the various hues of the spectrum, as well as all (including white) that can be formed from their mixture, may be derived from no more than three distinct colours. There are, in fact, an indefinite number of triads of colours which, in suitable combinations, are capable of producing the sensation of every tone, tint, and shade of colour which the eye of man has ever beheld.
Old-fashioned books, such as an early edition of Ganot’s “Physics,” tell us that the three “primary” colours are red, yellow, and blue, and that all others are produced by mixtures of these. ”

“ When it is considered that only one color is employed, the diversity of the results is wonderful. In many cases this is effected by apparently varying the application of the pigment, and laying it on more thickly in some places than in others. ”

“ The knavish practices to which the pigment has been subjected, have acquired it an ill-fame both with authors and artists. Vermilion has been charged with fading in the light, and with being blackened by impure air; but it was the custom to crimson the colour by means of lake, or tone it to a scarlet hue by red lead. With pigments as with persons, evil communications corrupt good manners—a motto that might be written with advantage on every palette. ”

“ For example, a pure red object under the noonday sun is likely to be painted an orange red by the artist because it does not appear as saturated as it would under a much lower intensity of illumination. In general, black and white are the final appearances of colors for respectively very low and very high brightness. As the intensity of illumination decreases, hue finally disappears and with continued decrease the color approaches black. Conversely, as the intensity of illumination increases, a color becomes apparently less and less saturated and tends toward white. ”

“ Owing to the limitations of pigment-material, however, it is impossible to reproduce the intensities of the Spectrum satisfactorily. An approximation is all that we can achieve in painting.
THE SPECTRUM SEQUENCE AND
THE CIRCUIT OF THE COLORS 135. Having produced the scale of twelve colors in the values of their greatest intensities, and as intense as possible, we get an approximation to the Spectrum with this difference, that the color Violet-Red (Purple) which we get in pigments and mixtures of pigments does not occur in the Spectrum and, so far as we know, does not belong in the Spectrum. ”

“ The substances employed as colouring matters for crayons are very numerous, and their choice offers a wide field for the skill and fancy of the artist. The pigment having been selected, it may be reduced to any shade or tint by admixture with other pigments, and by ‘dilution’ with a proper quantity of elutriated or prepared chalk. As, however, crayon colours do not admit of being mixed together at the time of using them, like liquid colours, it is usual to make 3 to 6 different shades of each colour, so as to enable the artist at once to produce any effect he chooses. ”

“ In pigments these effects are imitated by the mixture of white with a color to produce tints, and black for shades, or more generally instead of black some dark natural pigment approaching the hue of the color, may be preferred because a black pigment will too often impart an unexpected and undesirable hue to the color. As for example, in making shades of red some natural brown pigment is better than black, and so various dark browns and grays are used for different colors. ”

“ Broken Colors.—Gray colors, often improperly called broken tints. For simplicity, a tint of a color is described as the pure color mixed with white and a shade as the color mixed with black, and the corresponding broken color is the same color mixed with both white and black or with neutral gray. A tint of a color thrown into a shadow or a shade of a color in bright sunlight gives a broken color. For various reasons a very large proportion of the colors in nature are broken. ”

“ These spots of color, if you examine the picture carefully, really play the part of the shadows in the chiaroscuro of old pictures. Chiaroscuro, you remember, is the pattern of light and dark. Here the red box and the blue of the vase and the green and rose, of the camelias, yes, and even the face in the mirror, the marble shelf and fireplace—all represent the dark spots. But not dark in the old way of being shadows. They are dark as compared with the white of the dress, because their colors reflect less light than the white; their values are lower. ”

“ Even when employed as a shadow, without much judgment in its use, black is apt to appear as local colour rather than as privation of light; and black pigments obtained by charring have a tendency to rise and predominate over other hues, subduing the more delicate tints by their chemical bleaching power upon other colours, and their own disposition to turn brown or dusky. ”

“ Pigments are, and will in all probability continue to be, the practical agents of coloristic productions, however reluctant the scientist may be to accept them as the basis of a color system. It is true that they are chemically impure and imperfectly represent the colors of light. Some of them fade rapidly and undergo chemical change, as in the notable case of a green pigment tested 58 by this measured system, which in a few weeks lost four steps of chroma, gained two steps of value, and swung into a bluer hue. ”

“ Great simplicity of Chiaroscuro is requisite in this style of colouring. Both the white and the black must graduate uninterruptedly into the half-lights, which form the greater part of the picture. The crimsons, blues, and yellows, that support the black, must all partake of the same tone. The vermilion must graduate into purply tints, which will emerge through greys and greens to the bright blue. ”

“ It may be laid down as a rule that the black must be conspicuous. However small a point of black may be, it ought to catch the eye, otherwise the work is too heavy in the shadow. All the ordinary shadows should be of some colour—never black, nor approaching black, they should be evidently and always of a luminous nature, and the black should look strange among them; never occurring except in a black object, or in small points indicative of intense shade in the very centre of masses of shadow. Shadows of absolutely negative grey, however, may be beautifully used with white, or with gold ”

“ There are some which exhibit all their colour at a glance: there are others that the more they are looked into the more colour they are found to have—containing, as they do, an amount of latent colour, not immediately apparent. Apart from the beauty which a wealth of colour imparts, those pigments imbued with it are, as a rule, the most permanent. And not unnaturally so, for the more colour there is present, the longer it takes to be affected, either by exposure or impure air. Colour within colour, therefore, not only lends charm to a pigment, but contributes to its safety. ”

“ The vermilion shade of red is approximated by mixing white with orange-red.
The colored crayons with which the layout man should be supplied are exceedingly useful in determining color combinations. The eye is a reliable guide in this matter, if it is carefully trained to recognize color harmonies. It should be easy to distinguish the right from the wrong color treatment in Examples 5 and 6. The colder color should always predominate; backgrounds of bright red and bright yellow are difficult to harmonize with any color of ink excepting black. ”

“ Pigmentary black viewed under diffused daylight conditions is always associated with white light, as no substance, however black it may be, absorbs all the impinging light; as examples, the following measurements of three white and three black pigments were made at an angle of 45 degrees with a light intensity of 25 units. ”

“ As in nature, a shadow is formed by obstructing the light, so in the technic of coloring the shadow is obtained by the annihilation of the light-color. By combination of a primary color with a harmonizing secondary color of equal strength, we obtain the right shadow tone of the first color. In this way, by experiments in mixing, the right shadow tones, which form in a multi-colored edge, the gradual transitions of primary colors can be easily detected. ”