ROYGBIV is an

acronym An acronym is a word or name formed from the initial components of a longer name or phrase. Acronyms are usually formed from the initial letters of words, as in ''NATO'' (''North Atlantic Treaty Organization''), but sometimes use syllables, as ...

for the sequence of hues commonly described as making up a

rainbow A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows c ...

: red, orange, yellow, green, blue, indigo, and violet. There are several

mnemonic A mnemonic ( ) device, or memory device, is any learning technique that aids information retention or retrieval (remembering) in the human memory for better understanding. Mnemonics make use of elaborative encoding, retrieval cues, and image ...

s that can be used for remembering this color sequence, such as the name "Roy G. Biv" or sentences such as "

Richard of York Richard of York, 3rd Duke of York (21 September 1411 – 30 December 1460), also named Richard Plantagenet, was a leading English magnate and claimant to the throne during the Wars of the Roses. He was a member of the ruling House of Plantage ...

Gave Battle in Vain".

History

In the Renaissance, several artists tried to establish a sequence of up to seven

primary colors A set of primary colors or primary colours (see spelling differences) consists of colorants or colored lights that can be mixed in varying amounts to produce a gamut of colors. This is the essential method used to create the perception of a b ...

from which all other colors could be mixed. In line with this artistic tradition,

Sir Isaac Newton Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, physicist, astronomer, alchemist, theologian, and author (described in his time as a " natural philosopher"), widely recognised as one of the g ...

divided his

color circle A color wheel or color circle is an abstract illustrative organization of color hues around a circle, which shows the relationships between primary colors, secondary colors, tertiary colors etc. Some sources use the terms ''color wheel'' & ' ...

, which he constructed to explain

additive color Additive color or additive mixing is a property of a color model that predicts the appearance of colors made by coincident component lights, i.e. the perceived color can be predicted by summing the numeric representations of the component colo ...

mixing, into seven colors. Originally he used only five colors, but later he added orange and indigo to match the number of musical notes in the

major scale The major scale (or Ionian mode) is one of the most commonly used musical scales, especially in Western music. It is one of the diatonic scales. Like many musical scales, it is made up of seven notes: the eighth duplicates the first at doub ...

. The

Munsell color system In colorimetry, the Munsell color system is a color space that specifies colors based on three properties of color: hue (basic color), chroma (color intensity), and value (lightness). It was created by Professor Albert H. Munsell in the firs ...

, the first formal color notation system (1905), names only five "principal hues": red,

yellow Yellow is the color between green and orange on the spectrum of light. It is evoked by light with a dominant wavelength of roughly 575585 nm. It is a primary color in subtractive color systems, used in painting or color printing. In th ...

green Green is the color between cyan and yellow on the visible spectrum. It is evoked by light which has a dominant wavelength of roughly 495570 nm. In subtractive color systems, used in painting and color printing, it is created by a combin ...

blue Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when ...

, and

purple Purple is any of a variety of colors with hue between red and blue. In the RGB color model used in computer and television screens, purples are produced by mixing red and blue light. In the RYB color model historically used by painters ...

Mnemonics

Isaac Newton's color sequence (red, orange, yellow, green, blue, indigo, violet) is kept alive today by several popular

s. One is simply the nonsense word ''roygbiv'', which is an acronym for the seven colors. This word can also be envisioned as a person's name, "Roy G. Biv". Another traditional mnemonic device has been to turn the initial letters of the seven spectral colors into a sentence, most commonly "Richard Of York Gave Battle In Vain" (or the slight alternative "Richard Of York Gained Battles In Vain"). This mnemonic is said to refer to the defeat and death of Richard, Duke of York at the

Battle of Wakefield The Battle of Wakefield took place in Sandal Magna near Wakefield in northern England, on 30 December 1460. It was a major battle of the Wars of the Roses. The opposing forces were an army led by nobles loyal to the captive King Henry VI o ...

in 1460, or to his son

Richard III Richard III (2 October 145222 August 1485) was King of England and Lord of Ireland from 26 June 1483 until his death in 1485. He was the last king of the House of York and the last of the Plantagenet dynasty. His defeat and death at the Bat ...

being defeated at the

battle of Bosworth Field The Battle of Bosworth or Bosworth Field was the last significant battle of the Wars of the Roses, the civil war between the houses of Lancaster and York that extended across England in the latter half of the 15th century. Fought on 22 Augu ...

in 1485. Another sentence sometimes used is "Read Out Your Good Book In Verse", referring to the

Bible The Bible (from Koine Greek , , 'the books') is a collection of religious texts or scriptures that are held to be sacred in Christianity Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus ...

. The color sequence may also be recalled in reverse order with the mnemonic ''vibgyor''. In the modern era, these traditional mnemonics have been adapted to reflect the use of the

rainbow flag A rainbow flag is a multicolored flag consisting of the colors of the rainbow. The designs differ, but many of the colors are based on the spectral colors of the visible light spectrum. The LGBT flag introduced in 1978 is the most recognize ...

as a symbol of

LGBT movements Lesbian, gay, bisexual, and transgender (LGBT) movements are social movements that advocate for LGBT people in society. Some focus on equal rights, such as the ongoing movement for same-sex marriage, while others focus on liberation, as in the ...

. In Ireland, a campaign to reduce homophobic prejudice among schoolchildren revolves around the phrase "Respect Others, You Grow By Including Variety". In 2021, drag queen

Alaska Thunderfuck Justin Andrew Honard (born March 6, 1985) is an American drag queen and recording artist known by the stage name Alaska Thunderfuck 5000, primarily known mononymously as Alaska, from Erie, Pennsylvania. She is best known as the runner-up on th ...

released the song " ROY G BIV BBT", which adds new initials to the acronym representing "black", "brown" and "trans".

References

{{color topics Optical spectrum Mnemonics