When you are wearing it, will the gilet be open, zipped or partly zipped? Are you planning to wear it only with black/grey and possibly maroon?
I know I would wear something like that probably partly zipped showing a bit of the lining up round the neck and I'd have black or grey bottoms but a more colourful shirt/jumper in the pink/red/marron family.
If you want to wear with another colour, then maybe the grey is the best.