I'd not want to do that. Later electricians will find mauve, purple, fuscia
and olive wires. And not know which one is hot, or neutral. For the one time
expense, I'd suggest to buy new wire, and stick to the accepted colors for
hot, ground, and neutral.

Everything in the post was "accepted colors". Nothing suggested colors
that are not "accepted".

Yeah. I'd be pretty leery of an electrician that didn't understand
that setup... but then again, I'm used to dealing with electricians
that come and work on our 3-phase, 440V stuff.