Steampunk wiring - wiring color

[FRCTeam2906]

Considering the theme for this year's FRC game, Steampunk, we were wondering if we could use a copper colored wire for our positive wiring(+)?
As seen here:https://www.platt.com/platt-electric...spx?zpid=62861

I am aware that, robot rule R51, from the game last year, states that you may use: "Red, yellow, white, brown, or black-with-stripe on the positive connections."
Is this possible or should we go with plain brown wire?
Or should we stick to regular black and red to keep our wiring typical?

Any thoughts or comments are appreciated,
FRC Team 2906: Sentinel Prime Robotics
Spanaway Lake High School, Tacoma, WA