"Forbidden Colours" was the second collaborative single release for David Sylvian and Ryuichi Sakamoto. The song composed by Ryuichi Sakamoto with lyrics by David Sylvian was released in 1983 and it was the vocal version of the theme from the Nagisa Oshima's film "Merry Christmas, Mr. Lawrence". Both artists have recorded several interpretations of the song, both instrumental and vocal and it appeared as a B-side to David Sylvian's release "Red Guitar".