Color codes for DEC power supply terminals?

I'm trying to determine if DEC used any standards when choosing colors for the terminal connections on their power supply systems. I have a non DEC 'DECTape' drive I'm in the process of bringing back from the dead and am troubled by the manufacturers use of colors on their terminals. Some make sense: 'black', 'white', 'green' for primary color, although there is a block of 'red' used as an alternate connection to the 'black' (USA: 'hot' leg) of the primary (115VAC) connection. Others include 'blue', 'yellow' and 'orange'. I'm familiar with DEC's use of 'red' for +5, and 'orange' for +15 (or perhaps it was +12) but these do not seem to be the choices here. I've consulted my list of 'small computer handbooks' and 'interfacing' DEC books but haven't found anything useful. Also search google with many many permutations. Any ideas? Perhaps the manufacturer just pulled some out of their hat. Thanks, Gary