On May 9, 1889, the day after Dutch artist Vincent van ... the painting’s blue-hued flowers—but they’re seeing a distorted version. As a new exhibition illuminates, van Gogh’s irises ...

On May 8, 1889, painter Vincent van ... light-sensitive paint van Gogh used called geranium lake has degraded over the years, removing the red color that he mixed with blue to achieve violet.

Down the road, a field of heavy-headed sunflowers dazzled yellow under a blue sky. Morell had come to Arles to take photographs in the places Vincent van Gogh painted 130 years ago. But ...