The periwinkle jumpsuit was a sign. When Kimberly Saper Sanner met interior designer Summer Thornton for the first time to discuss the decor of her San Francisco home, Sanner arrived in a vintage Lanvin jumpsuit—the exact pale purplish blue of a de Gournay scenic wallpaper swatch. It felt like cosmic confirmation. “We’re wallpaper soulmates,” Sanner says. “I held my leg next to it and said, ‘We match!’”
Three and a half years—and six de Gournay patterns—later, the women’s collaboration has yielded a fantastical, hypercolorful dreamscape. The 1912 Tudor Revival house appears traditional, but inside it is a kaleidoscope of jewel tones, chinoiserie, contemporary art, metallic surfaces, and high-gloss finishes.
Sanner and her husband, who works in finance, bought the home in early 2021, drawn by its location beside the Presidio,…
