I've always based my wiring notations on an old GPO (old British telephone company) short code for wire colours, with two letter for each common colour.
These are the 0-9 resistor code colours; black is BK to avoid confusion with blue, and grey is SL (slate) to keep it apart from green.
BK
BR
RD
OR
YL
GN
BL
VI
SL
WH
PK = Pink
CY = Cyan
CL = clear
LG = light green
LB = light blue etc.
For multi colour wires, the first is the main colour and the second the lengthways "tracer" colour, like GN/BR
Add the band colours after that, so WH/GN/RD/YL
For the dashed tracer, use and underscore instead of the / like WH_BL ??
Vehicle wiring diagrams have no common standard for colour coding or abbreviations. It's down to the designer & the abbreviations they prefer in their language.