The number of Crayola crayon colors grows at an average rate of 2.56% annually.
Thus, "Crayola's Law": The number of colors will double every 28 years.
To create the chart, Velo gently scraped Wikipedia's list of Crayola colors, corrected a few hues, and added the standard 16-count School Crayon box available in 1935. Except for the dayglow-ski-jacket-inspired burst of neon magentas at the end of the '80s, the official color set has remained remarkably faithful to its roots! If the Law holds true, Crayola's gonna need a bigger box, because by the year 2050, there'll be 330 different crayons!
WeatherSealed Blog: Color Me a Dinosaur
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Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.