This may be of help, in that I have just had a look at my Tempo brand (Factory approved touch up paint) for Johnson 1967, code No.6702 and it looks very much like the 1972 and 73 green on the sales pamphlets I have.
Another suggestion, is to take part of the motor off, in which the paint is in good condition and take it to a paint shop where they specialize in matching ………..I have had good success with doing this here in NZ
MonteNZ