The Dark Side of the Moon

The composition is built on subtraction. A single white beam enters flat and level, meets the triangular prism at its centre-left, and bends into a spreading spectrum that exits toward the upper right. Everything else is voided black, so the eye has nowhere to wander; the focal path is forced along the line, into the glass, and out through the colour, a one-way journey that mirrors the physics being depicted.

The spectrum itself is not quite complete. The band of light carries six colours, missing the indigo of the usual seven-part division of the visible spectrum, a slight simplification that keeps the fan of colour crisp and readable against the dark.

The most radical formal decision is the absence of text. Neither the band's name nor the album title appears on the front, which throws all the weight onto the graphic and lets the shape alone carry identity. The triangle reads as a symbol of thought and ambition, and the prism was meant to reference the band's stage light show as well as the album's lyrical themes, so the single motif holds both spectacle and idea.

The design continues past the front. At the spectrum's exit the colour carries through to the gatefold, where it also renders a visual representation of the heartbeat sound used on the album, extending the beam into an image of pulse. On the back, another prism recombines the spectrum, closing the loop of dispersion and reunion, a mirroring that also allowed the sleeves to be laid out in repeating rows in shops. Together these choices turn a textbook diagram into a self-contained visual argument, where clarity itself becomes the statement.

The 1973 progressive rock album was released on Harvest Records with a sleeve credited to George Hardie, Hipgnosis, Harvest Records and Pink Floyd. The design was conceived by the British graphic design company Hipgnosis, founded by Storm Thorgerson and Aubrey Powell.

The brief came from keyboardist Richard Wright, who gave minimal direction, asking for something 'smarter, neater, more classy' and simple, 'like the artwork of a Black Magic chocolate box,' in short something 'simple and bold.' Thorgerson answered with a prism dispersing white light into the colour spectrum against black, an idea drawn from a photograph of a prism with a beam of white light emerging in the colours of the spectrum that he found in a 1963 physics textbook, and from an Alex Steinweiss illustration. The artwork itself was executed by Hipgnosis associate, designer and illustrator George Hardie.

Hipgnosis presented seven designs, one of them a photographic interpretation of the Silver Surfer from Marvel Comics. All four band members immediately chose the prism, with Roger Waters recalling, 'We all pointed to the prism and said, That's the one.' It was at Waters's suggestion that the spectrum was carried through into the gatefold.

The packaging was elaborate. It included two posters and two pyramid-themed stickers, and one of the posters was an infrared photograph of the Great Pyramids of Giza, which Powell and Thorgerson created after travelling to Egypt to shoot them. The recombining prism on the back of the sleeve was Thorgerson's suggestion.

The rainbow-through-a-prism graphic became a logo of sorts for prog fans and one of the most recognizable album covers in rock history. It served as Pink Floyd's unofficial visual trademark, so widely reproduced that it has since appeared on apparel, posters, mugs, magnets, beach towels, patches, buttons, a British postage stamp, and even the sides of vehicles. Aubrey Powell noted that the album sold roughly 64 to 65 million copies, meaning 'a billion people have probably seen that image.'

Critical recognition followed. Rolling Stone included it among its Top 100 album covers of all time, though not at number one, and LA Weekly described Thorgerson's cover as 'perhaps the most iconic in all of rock,' noting the parodies it has spawned. One album-artwork academic argues the cover exemplifies a bespoke sleeve-design revolution that turned music marketing strategies on their head. The original prism cover, credited to George Hardie, Hipgnosis and Harvest Records, is held in the collection of the Museum of Modern Art in New York.

The image has been reworked and mocked in equal measure. For the 30th-anniversary edition, a team including Thorgerson photographed a custom-made stained-glass window matching the original prism's dimensions, using transparent glass in place of the opaque spectrum colours. The Squirrels released an album-length parody titled 'The Not-So-Bright Side of the Moon' on February 15, 2000, its cover showing the beam of light coming out of vocalist Rob Morgan's head. Comedy act Richard Cheese parodied the artwork on his 2006 best-of 'The Sunny Side of the Moon.' Photographer Mason Maxwell created an accurate in-camera recreation using sunlight, a prism and cardboard as a tribute.