Contributed by Mary Jones / One of many pleasures in “Mashups,” Nancy Evans’s show at Sargent’s Daughters, is the sensation of immersive color. Eight abstract paintings, all 26 x 20 inches, reverberate softly with veils of translucent gradients and undulating organic form. The work is grounded in American Modernism, and a baseline of particular influences come to mind: Arthur Dove, Georgia O’Keefe, Charles Burchfield, and, as a watercolorist, Helen Frankenthaler. But Evans finds her own domain through a mediated technical process that generates luminous depth.