Wire Color Woes

[nnfuller]

So last year <R41> stated:

All active PD Board branch circuit wiring with a constant polarity (i.e., except for relay module, speed controller, or sensor outputs) shall be color-coded as follows:
A. Use red, white, brown, or black with stripe wire for +24 Vdc, +12 Vdc and +5 Vdc connections.
B. Use black or blue wire for common (-) connections.

Can someone explain to me why they care? Our team just got offered a large quantity of purple and teal automotive wire, and while ugly, it would be free, thankfully our electrical lead informed me of this rule, and I have to say I am rather frustrated at this... Help please? Would your robot be disqualified for incorrect color wiring?!?