Please do not use the screen image as a representation of the wallpaper/paint colour as this varies from monitor to monitor. Tangletree always recommend that you order a sample or colour card for a more accurate representation.
Based on scrapes and cross-sections taken in a number of houses and dating to the early years of the 19th century. Found in the dining room at Calke Abbey and the library at Kedleston... and yes, similar to the Regency scheme in the entrance hall and staircase at Castle Coole.