Ideally... I do love the finish on your hinges and they seems traditional and so does the cabinet design. What was the second finish you were thinking of doing?

We mix metals all the time. This kitchen display has bronze and nickel throughout.

I see you changed your discussion topic... giving more detail of your plan. Thanks for sharing. Burnished brass is good idea, copper too. Oil rubbed bronze will work well too. Copper being my last pick (only because it seems a bit of a trend). If you are changing knobs then I would worry, but pulls create limitations.

try here to find hinges in different colors to match the pulls https://www.houseofantiquehardware.com/

You can replace the hinges (as pointed out they're available) but as long as your pulls are close, I'd not overly worry about it. Now if I was putting brushed satin pulls on a cabinet with bronze hinges, I might, but if I'm going for a brighter copper/brass color I'd keep the darker brown hinges.