A detail as small as red drapery lining can make a room. This actually reminds me of a photo The Sartorialist posted a while back, of a woman in a monochromatic outfit, back turned to the camera, the only color in the shot a sliver of red on the soles of her Louboutins.
And how fantastic is the decrepit canvas?
Southside House, near Wimbledon Common. From Interiors, ed. Min Hogg and Wendy Harrop, 1988.