The background color is inspired by International Klein Blue, a hue that the artist Yves Klein first mixed in the 1950s, using it to make an array of monochromatic paintings until his death in 1962.

On this sumptuous surface he has hung 25 blue-hued paintings. The dominant tone is ... Most feature painted spots as a background, and a grid of white lines, sometimes suggesting a cage, or ...

He suggested, almost as an aside, that perhaps the shade of blue used as the painting’s background was, in fact, an “homage” to Tiffany and its signature color, generally referred to as ...