First of all, let me apologize in advance. This post is the first in what will no doubt become a lengthy series of colour questions. While I have reasonable confidence in my visualizations for many shades, there are other hews I just can't seem to picture properly. I'm always a bit insecure about heading out with an inappropriate colour combo, so I know I'll be hitting you ladies up for all your savvy advice. Thank you so much in advance, for myself and the people who don't have to look at scary colour faux-pas!

I work the overnight shift in a newsroom, so I can get away with a more lax wardrobe, but I prefer to dress to ordinary daytime standards in case big bosses have to come in and help with breaking news stories or if I get held up for the same reason. Today I kept it simple: cuffed chocolate brown pants, fitted white shirt, pearls,, silver teardrop earrings. I figured I could get away with wearing my favourite bronze Me Too ballet flats with this ensemble. The trouble came when I tried to decide on a coat and other accessories. I wore pearls because I felt they'd be safe and not clash with anything, but was sorely tempted to wear a colourful necklace with lots of turquoises, blues, pinks etc to liven up the outfit. If I'd opted for that necklace, would the bronze flats have added a discordant note?
Then there's the coat. The weather called for my long red trench. Would that have clashed with bronze? I really struggle to understand exactly what colour bronze most closely resembles and consequently what it goes with. I sort of picture it as a shiny brown shade, but it's not as clear cut to me as silver or gold (shiny grey and shiny pale yellow, yes)? Are metallics generally neutral? If I hadn't opted for bronze with the brown pants, would black have been my safest bet (I don't own brown flats)?

Thanks, ladies... hope my questions aren't too convoluted.