I always find the times when it really matters people just ignore color codes.
Case in point I once had to do a lighting upgrade on a metal shop back when T-8's were an upgrade form T12, it had a 480 delta service and a customer owned 480Y/277 transformer/ panel for the lighting and a newer CNC machiene.
The old 480 delta switch gear had Black/Red/Blue tape on the phase wires
and the 'newer' wye system was Brown Orange Yellow + White,
The office had a single phase transformer that also used Black & Red + white.
Another electrical outfit had done some work for the HVAC contractor and pulled BOY into one of the delta fed disconnects.
There also were these long runs of 120V circuits from the office using 480V conduits part of the way for stuff like a garage door opener so you had two white neutrals and two blacks in the same 3/4 in conduit one was 277 and one was 120.
I could tell which 480V system was which by age of the conduit and wire (TW vs THHN), using a meter you could still could get confused.
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