The white colour for 1983 cars was 038. From about 1984 onwards, the white used was 041. 041 is a slightly dirty white, probably the most unexciting colour ever. It was also used on Taragos and ordinary cars like that. But on a Sprinter I like it better than the newer brighter whites (040, 061 etc), as it looks more original.
HiLuxs and all commercial vehicles from the 80s- early 90s were painted in 045, a more creamy white, darker than the 041 of a Sprinter. It would be cool to see a AE86 done in 045, just to emphisize the dirty creamy colour. My mates KE25 got redone in 045 which suits it for the year. (Probably not a KE25 colour, but it looks right).