Behind speaker L. Tom Perry during the October 1983 general conference, female members of the Choir wear a light pink dress with draping in the front. This is the same style of dress as was used the year previous, though in a different color (it was blue in 1982).
Men of the Choir at the October 1983 general conference wear khaki suits with white shirts and red ties.
Photos from conference footage.
In March 1989, the Choir performed at Walt Disney World in Orland, Florida. Their wardrobe, suits for the men and draping red dresses for the women, could almost be passed off for a style worn today. (Fun fact: the Choir's performances were used by Disney in four national TV broadcasts.)