Turquoise and Yellow: Measuring the Gap in My Knowledge in Parsecs

Guardian website: Do you see blue or green? This viral test plays with color perception

Colour Literacy Project: Resources

Science How Stuff Works: Earth's Oldest Color was Pink

Martin Bricelj Baraga (cyanometer art installation): Cyanometer

Color categories in thought and language, edited by C. L. Hardin and Luisa Maffi. Cambridge University Press, New York: 1997

Encyclopedia of Color Science and technology (UC Irvine): World Color Survey

Space.com: Parsec

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