DP, according to my sources it was, in 1980: Topside: Grey Blue FS 35237, Light Compass Ghost Grey FS 36375; Underside: Light Grey FS 36495.
In 1983: Topside: Grey Blue FS 35237, Dark Compass Ghost Grey FS 36320; Underside: Light Compass Ghost Grey FS 36375. It was actually a 3 tone scheme.
_________________ "It is better to type nothing and be assumed an ass, than to type something and remove all doubt." - Me