Abstract painter Lauri Chambers has been working within what sound like strict limitations for years—black and white only, except for dashes of blue that appear like something out of the corner of one’s eye—and this means that what her art teaches you is to dive in further to search for the smallest variations, which quickly begin to seem not small at all. She has so many versions of black and white, and so many ideas about what they can do to each other. (Francine Seders Gallery, 6701 Greenwood Ave N, sedersgallery.com, 1–5 pm/reception 2–4 pm, free)