(48) The theory so long held of three primary and four secondary colors is purely exoteric, for since the earliest periods it has been known that there are seven, and not three, primary colors, the human eye being capable of estimating only three of them. Thus, although green can be made by combining blue and yellow, there is also a true or primary green which is not a compound. This can he proved by breaking up the spectrum with a prism. Helmholtz found that the so-called secondary colors of the spectrum could not be broken up into their supposed primary colors. Thus the orange of the spectrum, if passed through a second prism, does not break up into red and yellow but remains orange.

(68) Timaeus: but when these colors are mixed and more completely burned, and black is blended therewith, the result is “violet.” “Chestnut” comes from the blending of yellow and grey; and “grey” from white and black; and “ochre” from white mixed with yellow. And when white is combined with “bright” and is steeped in deep black it turns into a “dark blue” color; and dark blue mixed with white becomes “light blue”; and chestnut with black becomes “green.” As to the rest, it is fairly clear from these examples

(42) When the colors are related to the twelve signs of the zodiac, they are arranged as the spokes of a wheel. To Aries is assigned pure red; to Taurus, red-orange; to Gemini, pure orange; to Cancer, orange-yellow; to Leo, pure yellow; to Virgo, yellow-green; to Libra, pure green; to Scorpio, green-blue; to Sagittarius, pure blue; to Capricorn, blue-violet; to Aquarius, pure violet; and to Pisces, violet-red.

(40) There are numerous arbitrary arrangements setting forth the mutual relationships of the planets, the colors, and the musical notes. The most satisfactory system is that based upon the law of the octave. The sense of hearing has a much wider scope than that of sight, for whereas the ear can register from nine to eleven octaves of sound the eye is restricted to the cognition of but seven fundamental color tones, or one tone short of the octave. Red, when posited as the lowest color tone in the scale of chromatics, thus corresponds to do, the first note of the musical scale. Continuing the analogy, orange corresponds to re, yellow to mi, green to fa, blue to sol, indigo to la, and violet to si (ti). The eighth color tone necessary to complete the scale should be the higher octave of red, the first color tone. The accuracy of the above arrangement is attested by two striking facts: (1) the three fundamental notes of the musical scale--the first, the third, and the fifth--correspond with the three primary colors--red, yellow, and blue; (2) the seventh, and least perfect, note of the musical scale corresponds with purple, the least perfect tone of the color scale.

(1) 'The red colour of burning fire (agni) is the colour of fire, the white colour of fire is the colour of water, the black colour of fire the colour of earth. Thus vanishes what we call fire, as a mere variety, being a name, arising from speech. What is true (satya) are the three colours (or forms).

(4) 'The red colour of the lightning is the colour of fire, the white of water, the black of earth. Thus vanishes what we call the lightning, as a mere variety, being a name, arising from speech. What is true are the three colours.

(2) 'The red colour of the sun (âditya) is the colour of fire, the white of water, the black of earth. Thus vanishes what we call the sun, as a mere variety, being a name, arising from speech. What is true are the three colours.

(25) I have reckoned up only some few of the forms and colours of them, but there are a great many more that might be written down, which I will omit for brevity's sake.

(22) The green color alludes to the vegetation which covers the face of the earth, and therefore represents the robe of Nature. The black represents death and corruption as being the way to a new life and generation. "Except a man be born again, he cannot see the kingdom of God." (John iii. 3.) White, yellow, and red signify the three principal colors of the alchemical, Hermetical, universal medicine after the blackness of its putrefaction is over.

(3) 'The red colour of the moon is the colour of fire, the white of water, the black of earth. Thus vanishes what we call the moon, as a mere variety, being a name, arising from speech. What is true are the three colours.

(66) The vignettes generally give the plan of the domain, and very often the colour with which it is painted; they are either green or light yellow . In most of the papyri there are only four yellow—3, 9, 10, and 14

(1) Now those arteries of the heart consist of a brown substance, of a white, blue, yellow, and red substance, and so is the sun brown, white, blue, yellow, and red.

(37) In Meno, Plato, speaking through Socrates, describes color as "an effluence of form, commensurate with sight, and sensible." In Theætetus he discourses more at length on the subject thus: "Let us carry out the principle which has just been affirmed, that nothing is self-existent, and then we shall see that every color, white, black, and every other color, arises out of the eye meeting the appropriate motion, and that what we term the substance of each color is neither the active nor the passive element, but something which passes between them, and is peculiar to each percipient; are you certain that the several colors appear to every animal--say a dog--as they appear to you?"

(68) Timaeus: which is midway between these reaches to the liquid of the eyes and is mingled therewith, it is not brilliant but, owing to the blending of the fire's ray through the moisture, it gives off a sanguine color, and we give it the name of “red.” And “bright” color when blended with red and white becomes “yellow.” But in what proportions the colors are blended it were foolish to declare, even if one knew, seeing that in such matters one could not properly adduce any necessary ground or probable reason. Red blended with black and white makes “purple”;

(41) In The Principles of Light and Color, Edwin D. Babbitt confirms the correspondence of the color and musical scales: "As C is at the bottom of the musical scale and made with the coarsest waves of air, so is red at the bottom of the chromatic scale and made with the coarsest waves of luminous ether. As the musical note B [the seventh note of the scale] requires 45 vibrations of air every time the note C at the lower end of the scale requires 24, or but little over half as many, so does extreme violet require about 300 trillions of vibrations of ether in a second, while extreme red requires only about 450 trillions, which also are but little more than half as many. When one musical octave is finished another one commences and progresses with just twice as many vibrations as were used in the first octave, and so the same notes are repeated on a finer scale. In the same way when the scale of colors visible to the ordinary eye is completed in the violet, another octave of finer invisible colors, with just twice as many vibrations, will commence and progress on precisely the same law."

(49) Consciousness, intelligence, and force are fittingly symbolized by the colors blue, yellow, and red. The therapeutic effects of the colors, moreover, are in harmony with this concept, for blue is a fine, soothing, electrical color; yellow, a vitalizing and refining color; and red, an agitating and heat-giving color. It has also been demonstrated that minerals and plants affect the human constitution according to their colors. Thus a yellow flower generally yields a medicine that affects the constitution in a manner similar to yellow light or the musical tone mi. An orange flower will influence in a manner similar to orange light and, being one of the so-called secondary colors, corresponds either to the tone re or to the chord of do and mi.