High Quality Content by WIKIPEDIA articles! Yale Blue is the dark blue color used in association with Yale University. IT is defined as the color of light with a 482-nm wavelength, yet more practically varies with use and history. UNiversity Printer John Gambell characterized the spirit of the color as "a strong, relatively dark blue, neither purple nor green, though it can be somewhat gray. IT should be a color you would call blue." The hexadecimal value of the color is 0F4D92. THe university administration defines Yale Blue as a custom color whose closest approximation in the Pantone system is Pantone 289, with Pantone 288 and Pantone 654 as related colors of higher and lower intensity. THe Yale Corporation adopted blue as the university's color in 1894, after a half century during which green was associated with the university.