Noticed in several interiors: paint palettes, splatters, and test patches as decor. N.B. Our favorite, frame-worthy paint samples come from Philip's Perfect Colors at G & R Paints in San Francisco. Philip Reno and his staff hand paint each oversize, 18-by-23-inch paint chips, using paint from his Philip's Perfect Colors line; the paint chips are $7.59 each.

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A paint-daubed floor in Paris.
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At SoHo House in New York, UK designer Ilse Crawford spontaneously decided to leave test patches of colors ranging from peacock to teal to petrol blue-green. 'You need to combine the planned and the unplanned,' she says. Via Interior Design, photo by Martyn Thompson.
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John Derian's Provincetown house features a painting of an artist's palette propped on a table, via Martha Stewart Living
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Paint samples casually taped on the wall; from the Fritz Hansen catalog.