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RYB color model

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"RYB" redirects here. For other uses, see RYB (disambiguation).

RYB (an abbreviation of red–yellow–blue) is a subtractive color model used in art and applied design in which red, yellow, and blue pigments are considered primary colors.[1] Under traditional color theory, this set of primary colors was advocated by Moses Harris, Michel Eugène Chevreul, Johannes Itten and Josef Albers, and applied by countless artists and designers. The RYB color model underpinned the color curriculum of the Bauhaus, Ulm School of Design and numerous art and design schools that were influenced by the Bauhaus, including the IIT Institute of Design (founded as the New Bauhaus), Black Mountain College, Design Department Yale University, the Shillito Design School, Sydney, and Parsons School of Design, New York.

An RYB color chart from George Field's 1841 Chromatography; or, A treatise on colours and pigments: and of their powers in painting
Comparison between CMYK model and RYB model: ideal CMY (a), printed CMY (b), RYB approximation (c)
The 1613 RYB color scheme of Franciscus Aguilonius (Francisci Agvilonii), with primaries yellow (flavus), red (rubeus), and blue (caeruleus) arranged between white (albus) and black (niger), with orange (aureus), green (viridis), and purple (purpureus) as combinations of two primaries
Le Blon's 1725 description of mixing red, yellow, and blue paints or printing inks
Chromatic Scale (Echelle Chromatique), J. F. L Mérimée (1830, 1839)

In this context, the term primary color refers to three exemplar colors (red, yellow, and blue) as opposed to specific pigments. As illustrated, in the RYB color model, red, yellow, and blue are intermixed to create secondary color segments of orange, green, and purple. This set of primary colors emerged at a time when access to a large range of pigments was limited by availability and cost, and it encouraged artists and designers to explore the many nuances of color through mixing and intermixing a limited range of pigment colors. In art and design education, gray, red, yellow, and blue pigments were usually augmented with white and black pigments, enabling the creation of a larger gamut of color nuances including tints and shades.

Although scientifically obsolete because it does not meet the definition of a complementary color in which a neutral or black color must be mixed, it is still a model used in artistic environments, causing confusion about primary and complementary colors. It can be considered an approximation of the CMY color model.

The RYB color model relates specifically to color in the form of paint and pigment application in art and design.[2] Other common color models include the light model (RGB) and the paint, pigment and ink CMY color model, which is much more accurate in terms of color gamut and intensity compared to the traditional RYB color model, the latter emerging in conjunction with the CMYK color model in the printing industry.

History

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The first scholars to propose that there are three primary colors for painters were Scarmiglioni (1601), Savot (1609), de Boodt (1609) and Aguilonius (1613).[3] From these, the most influential was the work of Franciscus Aguilonius (1567–1617), although he did not arrange the colors in a wheel.[4]

Jacob Christoph Le Blon was the first to apply the RYB color model to printing, specifically mezzotint printing, and he used separate plates for each color: yellow, red and blue plus black to add shades and contrast. In 'Coloritto', Le Blon asserted that “the art of mixing colours…(in) painting can represent all visible objects with three colours: yellow, red and blue; for all colours can be composed of these three, which I call Primitive”. Le Blon added that red and yellow make orange; red and blue, make purple; and blue and yellow make green (Le Blon, 1725, p6).[5][6]

In the 18th century, Moses Harris advocated that a multitude of colors can be created from three "primitive" colors – red, yellow, and blue.[7]

Mérimée referred to "three simple colours (yellow, red, and blue)" that can produce a large gamut of color nuances. "United in pairs, these three primitive colours give birth to three other colours as distinct and brilliant as their originals; thus, yellow mixed with red, gives orange; red and blue, violet; and green is obtained by mixing blue and yellow" (Mérimée, 1839, p245). Mérimée illustrated these color relationships with a simple diagram located between pages 244 and 245: Chromatic Scale (Echelle Chromatique).De la peinture à l’huile : ou, Des procédés matériels employés dans ce genre de peinture, depuis Hubert et Jean Van-Eyck jusqu’à nos jours was published in 1830 and an English translation by W. B. Sarsfield Taylor was published in London in 1839.[8]

Similar ideas about the creation of color using red, yellow, and blue were discussed in Theory of Colours (1810) by the German poet, color theorist and government minister Johann Wolfgang von Goethe.[9]

In The Law of Simultaneous Color Contrast (1839) by the French industrial chemist Michel Eugène Chevreul discussed the creation of numerous color nuances and his color theories were underpinned by the RYB color model.[10]

Separate to the RYB color model, cyan, magenta, and yellow primary colors are associated with CMYK commonly used in the printing industry. Cyan, magenta, and yellow are often referred to as "process blue", "process red", and "process yellow".[11][12]

Old model of coloration with four primaries

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The ancient Greeks, under the influence of Aristotle, Democritus and Plato, considered that there were four basic colors that coincided with the four elements: earth (ochre), sky (blue), water (green) and fire (red), while black and white represented the light of day and the darkness of night. [citation needed] The four-color system is formed by the primaries yellow, green, blue and red, and was supported by Alberti in his "De Pictura" (1436), using the rectangle, rhombus, and color wheel to represent them.

 
Color Circle from 1708, based on the primary colors blue, red, and yellow[13]

Leonardo da Vinci endorsed this model in 1510, although he hesitated to include green, noting that green could be obtained by mixing blue and yellow. Also Richard Waller, in his "Catalogue of Simple and Mixed Colors" (1686), graphed these four colors in a square.[14] These four colors have often been referred to as "the primary psychological colors".[15]

Traditional coloring with three primaries

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The first known case of trichromacy coloration (of 3 primaries) can be found in a work on optics by the Belgian thinker Franciscus Aguilonius in 1613,[16] who in his "Opticorum libri sex, philosophis iuxtà ac mathematicis utiles" in Latin (Roughly, Six books of optics: useful to philosophers as well as to mathematicians), graphed the colors flavvus, rvbevs and cærvlevs (yellow, red and blue) giving rise to the intermediate colors avrevs, viridis and pvrpvrevs (orange, green and purple) and their relationship with the extremes albvs and niger (white and black).[17] However, the idea of three primary colors is older, as Aguilonius supported the view known since the Middle Ages that the colors yellow, red, and blue were the basic or "noble" colors from which all others are derived.[18]

This model was used for printing by Jacob Christoph Le Blon in 1725 and called it Coloritto or harmony of colouring,[19] stating that the primitive (primary) colors are yellow, red and blue, while the secondary are orange, green and purple or violet.[20]

In 1766, Moses Harris developed an 18-color color wheel based on this model, including a wider range of colors by adding light and dark derivatives.[21] During the 18th and 19th centuries, this color model was endorsed by many authors who have left illustrations that can still be appreciated today, such as Louis-Bertrand Castel (1740), the Tobias's color system Mayer (1758), Moses Harris (1770–76), Ignaz Schiffermuller (1772), Baumgartner and Muller (1803), Sowerby (1809), Runge (1809), the popular "Theory of Colors" (1810) by Goethe, Gregoire (1810–20), Merimee (1815-30-39), Klotz (1816), G. Field (1817-41-50), Hayter (1826 ), the "Law of Simultaneous Contrast of Colours" (1839) by Chevreul and many others.[22]

 
Harris's 'colour wheel' showing how a range of colours can be made from red, yellow and blue

By the 20th century, natural pigments gave way to synthetic ones. The invention of phthalocyanine and derivatives of quinacridone, expanded the range of primary blues and reds, getting closer to the ideal subtractive colors and the CMY and CMYK models.

 
Use in printing of color books in 1902 through the so-called "tricolor process"

See also

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References

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  1. ^ Gage, John (1995). Colour and Culture : Practice and Meaning from Antiquity to Abstraction. London: Thames & Hudson. ISBN 978-0500278185.
  2. ^ Gage, John (2000). Color and Meaning: Art, Science, and Symbolism. London: Thames & Hudson. ISBN 978-0520226111.
  3. ^ Shapiro, A.E. (1994). "Artists' colors and Newton's colors". Isis. 85 (4): 600–630. doi:10.1086/356979. S2CID 143026899.
  4. ^ "Franciscus Aguilonius". Colorsystem: Colour order systems in art and science. Archived from the original on 2014-02-13.
  5. ^ Le Blon, Jakob Christophe (1725). Coloritto; or the Harmony of Colouring in Painting: Reduced to Mechanical Practice under Easy Precepts, and Infallible Rules; Together with some Colour'd Figures. Retrieved 4 July 2020.
  6. ^ Mortimer, Cromwell (February 1731). "An Account of Mr. J. C. Le Blon's Principles of Printing, in Imitation of Painting, and of Weaving Tapestry, in the Same Manner as Brocades". Philosophical Transactions of the Royal Society of London. 37 (419): 101–107. doi:10.1098/rstl.1731.0019. S2CID 186212141. Retrieved 4 July 2020.
  7. ^ Harris, Moses (1766). The Natural System of Colours. (Facsimile edition of 1963), New York: Whitney Library of Design.
  8. ^ Mérimée, J.F.L. (1839). The art of painting in oil and in fresco: Being a history of the various processes and materials employed (translated from the French by W. B. Sarsfield Taylor. London: Whittaker & Co.
  9. ^ Goethe, Theory of Colours, trans. Charles Lock Eastlake, Cambridge, MA: MIT Press, 1982. ISBN 0-262-57021-1
  10. ^ Chevreul, Michel Eugène (1861). The Laws of Contrast of Colour. London: Routledge, Warne, and Routledge. p. 25. – English translation by John Spanton
  11. ^ St. John, Eugene (February 1924). "Some Practical Hints on Presswork". Inland Printer, American Lithographer. 72 (5): 805. Retrieved 18 February 2019.
  12. ^ White, Jan (2003). Editing by Design: For Designers, Art Directors, and Editors—the Classic Guide to Winning Readers. Simon and Schuster. p. PT460. ISBN 9781581159387. Retrieved 18 February 2019.
  13. ^ Traité de la peinture en mignature (The Hague, 1708), reproduced at The Creation of Color in Eighteenth-Century Europe
  14. ^ Richard Waller Color System
  15. ^ MS Sharon Ross, Elise Kinkead (2004). Decorative Painting & Faux Finishes. Creative Homeowner. ISBN 1-58011-179-3.
  16. ^ .org/web/20140213041900/http://www.colorsystem.com/?page_id=629&lang=en Franciscus Aguilonius Colorsystem. Farbsysteme in Kunst und Wissenschaft
  17. ^ Francisco de Aguilón, Antwerp 1613: Opticorum book sex, philosophis iuxta ac useful mathematics, p. 40 Archived 2015-09-24 at the Wayback Machine San Millán Foundation of the Cogolla p. 84
  18. ^ MacEvoy, Bruce (2005). "Color vision: Do "primary" colors exist?". Handprint.com. Retrieved September 1, 2017.
  19. ^ O. M. Lilien, Jacob Christoph Le Blon, 1667–1741: Inventor of Three- and Four-colour Printing. Stuttgart 1985
  20. ^ Shevell, Steven K. (July 11, 2003). "The Science of Color". Elsevier – via Google Books.
  21. ^ Paul Zelanski, Mary Pat Fisher 2001. "Colour" London
  22. ^ David Briggs 2013, The Dimensions of Color 7.2 The RYB hu e circle or "artists' color wheel".
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