If blue’s your color, run with it. I love to use variations of a color in the same room. Layering several shades of a single color—from light to dark, bright to somber—can create a visually stimulating effect. Consider all the ways in which you can introduce a color—paint, textiles, ceramics, artwork, even hardware. The swatches for my blue palette include striped rugs and several color tones to test for walls, trim, and ceiling, plus some patterned fabrics.