Over the past seventy years, Colorado has built a strong tradition in hard-edged abstraction and pattern painting that flourishes even today in the work of some of the most advanced artists in the state. That's doubtless why Collin Parson, the Arvada Center's visual-art director, decided to put together Perception: Color/Line/Pattern. The expansive exhibit included some mid-twentieth-century works by the likes of Charles Bunnell, Vance Kirkland, Bev Rosen and others, moved on to those from the late twentieth century, including Clark Richert and David Yust, and finished up with younger artists working now with patterns, shapes and lines, among them Jaime Correjo, Adam Holloway, Wendi Harford, Emilio Lobato and Lewis McInnis.