Don't know if all do, But I've seen like a dozen instances where the aftermarket part for a specific make/model fitting having the same color. My examples have all been GM vehicles, and not every single wire but majority.
Chip
'Rusto-Mod'
'51 Chevy 3600 5 window | C4 Corvette front/rear suspension & drivetrain | everything else looks old and stock
'92 GMC Sonoma GT #15 of 806
'91 GMC Sonoma GT Extended cab 1 of 1
Trucks, Trucks.....and more Trucks | 
