This weekend marked the beginning of Ririe-Woodbury Dance Company’s 2011-12 season. Last year’s final show was so colorful and imaginative it seemed reasonable to ask how the company could possibly supersede that prior spectacle. The company’s artistic director, Charlotte Boye-Christensen, was wise enough not to attempt such a feat. Rather, she courageously took the company in the opposite direction. While last night’s show bore the title Polychromatic, the set of pieces performed seemed considerably subdued compared to work produced by Ririe-Woodbury in recent seasons.