Irises, 1889, Vincentvan Gogh.

However, it turns out that these flowers weren’t always blue.

The Getty Museum has been home toIrisessince it acquired the painting in 1990.

“Irises” by Vincent Van Gogh

“Irises,” 1889, Vincentvan Gogh. Oil on canvas Photo: Vincent Van Gogh viaWikimedia Commons(Public domain)

The biggest discovery is that the light has irrevocably changed some of the colors inIrises.

Van Gogh created violet paint by mixing blue and red paints, writes the museum.

This pigment has since faded dramatically due to light exposure early in the paintings history.

An X-ray fluorescence scan of Irises

XRF of “Irises” (detail), 1889, Vincent van Gogh. Oil on canvas. Photo: Getty Museum

This exhibition showcases the revelatory results of those studies.

XRF of Irises (detail), 1889, Vincent van Gogh.