DON'T DO IT
It's very unlikely that I will. I have tried to visualise other colour schemes for these old bikes, based on the dark colours they were originally available in (that's why my Humber is blue), but I can't imagine any of them looking good with black rims, bars etc - except for black, of course. Dark colours don't show dirt or rust spots too badly and tend to age gracefully. Over the years I've had a few bright coloured frames and they start to look tatty quite quickly.
The combination of lack of imagination, conservatism and pragmatism are likely to lead to black frame and forks with contrasting black mudguards, rims, bars - naturally with gold and red lining as appropriate .