These days, skimming around the internet can produce a kind of digital Stendahl syndrome, a sensory overload in need of periodic visual palate cleansing. Venerable websites like Purple.com and Sometimes Red, Sometimes Blue can help clear the afterimages, and there’s always International Klein Blue for the perfect modernist meditation. But you can fine-tune your retinal relaxation even further. Milo Vermeulen’s website of hex color code tests is a rich directory of nuanced shades: I recommend firebrick, indianred and navajowhite for quick jolts of chromatic energy. And for slightly more animated distraction, the minimalist work of artist Rafaël Rozendaal offers single servings lightly flavored with humor, affection and remorse.