Trinity Repertory Co. is raising funds with a palette of reds, whites and blues. During its second annual benefit party Saturday, guests will have a chance to taste a variety of wines, dance to the bluesy sounds of the local band, The Silks, and sample food from several restaurants. The event will once again be held at the Pell Chafee Performance Center in Providence, which hosted 275 supporters in 2012. All proceeds from Red White & Blues will benefit Trinity’s artistic and educational programming.