Rainbow is a Dolly Parton album from 1987, her first after switching labels to Columbia Nashville, after nearly two decades with RCA Nashville. It is her 28th solo studio album. The original plan, when Parton signed with CBS, was for her to alternate between releasing pop and country albums (rather than trying to combine the two styles on each album), but due to Rainbow's poor sales and tepid critical reception, the plan was quickly abandoned, and Parton more or less focused on recording country material for the remainder of her association with the label.
The album was among Parton's lowest charting albums to that point. It stalled at 153 on the U.S. pop albums charts and barely cracked the top twenty on the country albums charts; its first single, "The River Unbroken" missed the country top 40 entirely, stalling at # 63, and did not make the pop charts; its second single, "I Know You by Heart", a duet with Smokey Robinson, did not chart at all. A third single, "Make Love Work", was released in June 1988, but fared poorly, likely due, in part, to competition from "Wildflowers", a top-ten single by Parton, Emmylou Harris and Linda Ronstadt released from their 1987 Trio album a month earlier.
Rainbow's release coincided with the launch of Parton's ill-fated 1987-88 variety show, Dolly, and much of the music on the album was highlighted on the show.