Here's a brief rundown of liveries for the postwar "SMEE" LAHT (carbon alloy painted) cars. Note all cars R32 and up (except R33 and R36) are stainless.
IND/BMT
R10: factory livery grey with orange, small number painted red 1962, some painted World's Fair turquoise 1965-66, entire fleet MTA Silver & Blue in 1970s, 110 overhauled kale green in 1985
R16: 1955 factory livery olive drab (army green), some painted bright red 1968-69, MTA Silver & Blue in 1970s
R27/R30: same as R16s, all R30s and small number of R27s redone in Gunn Red 1985-89
IRT
R12/R14: same factory livery as R10s, some painted bright red 1965, MTA Silver & Blue in 1970s, some R14s painted white (1982-83)
R15: factory livery maroon with cream, then same as R12/R14
R17: factory livery maroon with cream, then same as R12/R14 to 1980s, small number (16) painted Gunn Red 1985-86 for shuttle service, one painted kale green 1985
R21/R22: same as R17s except olive drab (army green) factory livery. One R21 painted kale green 1985
R26/R28: same factory livery as R21/R22, later MTA Silver & Blue in 1970s and white (1983-84). Redone in Gunn Red when rebuilt at Morrison Knudsen (1985-87)
R29/R33/R36 ML: bright red factory livery with yellow grab irons (introduced on R29s), MTA Silver & Blue early 70s, white 1983-84, then redone as Gunn Red (1985-89). 12 R33s painted kale green (1985)
R33/R36 WF: delivered new with two-tone turquoise ("Blue Arrow") for World's Fair, some cars in MTA livery (mid 70s), all cars in white by 1983. First cars redone in Gunn Red (starting in autumn 1984)
Since my friend continues to chain smoke nonstop, she is probably an Alco.
