Williamson's guiding mantra is based in the power of contrast--think a velvet goldenrod sofa against a backdrop of high-gloss grass-green bookshelves. She eschews white walls and unfilled space. Say yes to cast-offs, she urges, and this philosophy is evident in the layered look of her rooms, which are filled with artwork, textiles, and a good number of antiques. Balance is achieved via uniting threads: red in the picture frames and accent pieces in her compact Swiss flat; lacquered ceilings throughout the first floor of a farmhouse with the delightful name of Puddleduck.

The photographs take pride in place, ample in number and gorgeous in their unexpected combinations: A green-and-gold library is preceded by a Pink Panther-colored living room; a white-and-red checkerboard kitchen floor abuts a set of primary-blue sliding doors, which give way to original oak cabinetry in the butler's pantry.

Williamson's mastery proffers simple lessons, as of how to mix midcentury modern furniture with period pieces and on creative ways to repurpose already-owned items. Still, the book has an aspirational quality, its interiors a leap for laypeople. Williamson leans into her yearslong design evolution, presenting her first homes right alongside later ones and detailing how she grew out of her imposter syndrome as a self-taught designer. These charming insights anchor her accomplishments in family history and a circle of friends with good taste; two of the pictured homes aren't Williamson's creations at all, but rather spaces she admires, serving to widen the scope of her method past one individual interpretation.

The Art of the Clash is a striking addition to the canon of color-forward interior design. -- "Foreword Reviews"