I would choose a color that can easily match joysticks, buttons & trim.
Then you can avoid costly artwork on the control panel (underpaint some plexi with a metal flake black maybe, the kind for RC cars) perhaps?
Of course this is your arcade we are talking about here though so do as you want, this is just me dreaming out loud.
Imagine that artwork in red & black with a red spinner, red trackball glowing, red buttons, red joysticks & red trim with red coin rejects lit up. Or the same with blue, green or purple (GGG has the odd colors in trackballs FYI).
Just some thoughts, damn I want to build an upright in a Taito cabinet now