Model Jessie May Smart poses with Blue Morpho butterflys, ahead of the opening of, “Butterflies in the Glasshouse”, at RHS Wisley in Wisley, Britain, January 13, 2017. (Photo by Peter Nicholls/Reuters)

Undated David Yarrow handout photo of a gorilla as the self-taught wildlife photographer promotes his book, Encounter. (Photo by David Yarrow/Clearview/PA Wire)

Lorella Boccia attends Giffoni Film Festival blue carpet on July 23, 2014 in Giffoni Valle Piana, Italy. (Photo by Maria Laura Antonelli/AGF/SIPA Press)

These are the dunes of the Namib Desert, taken by Korea's Kompstat-2 satellite. The blue and white area is the dried riverbed of the Tsauchab river. (Photo by The European Space Agency)

Ling Pham attends the L'Oreal Paris Blue Obsession Party at the annual 69th Cannes Film Festival at Hotel Martinez on May 18, 2016 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images)

A reflection on waste liquid shows a tourist walking near the Blue mosque at the Sultanahmet Square on the first day of the Muslim fasting month of Ramadan in Istanbul on April 13, 2021. (Photo by Ozan Kose/AFP Photo)

A blue-tailed bee-eater chases down its prey along the banks of the Kaveri River on the outskirts of the city of Mysore, India in the last decade of June 2025. (Photo by Nitin Jain/Solent News)

Very impressive, the RGB Colorspace Atlas is a beautiful picture book by American artist Tauba Auerbach. The book displays the full RGB gradient in 3,632 pages.