“Light is my medium to be investigated,” says the Japanese artist Hiroshi Sugimoto, who spent years chasing bands of prismatic color around his studio in Tokyo and capturing them, with what was for him rapid-fire succession, using a Polaroid camera. In collaboration with Hermès, 20 of the artist’s abstract color studies have been translated into silk scarves in signed, limited editions of seven each. “Couleurs de L’Ombre” (Colors of Shadow), as the collection is called, is a moving tribute to the lowly Polaroid, which faces imminent extinction.