So the pics, is of the pedestal sink we purchased and the champagne bronze faucet and matching toilet paper holder and towel rack we are thinking of purchasing. Then it's a matter of the light fixture to buy. Would a matte black light work with the other champagne bronze fixtures?The light budget has to be under $300 so the sky is not the limit. lower wall: shiplap painted white upper wall: darker gray if we use matte black light fixture unless navy blue would also match Floor: white hexagon tile with medium dark gray grout. Mirror: may do a rectangle mirror with either all glass look but with detailed sides OR a round mirror like the ones on a rope OR simple round mirror with gold/white or black tones. Mirror will be the last thing chosen.

https://trubuildconstruction.com/how-to-get-your-best-estimate/the-best-light-fixtures-to-match-delta-champagne-bronze capital lighting in aged bronze https://www.houzz.com/discussions/3066347/delta-champgne-bronze-faucet-match-light-fixture

Absolutely, why not? The trend is now in mixing materials.

Why not stop with all the matching you have going on and get some nice lighting in a nother finish . I am not which since I do not see your space but IMO all matchy makes for a boring space . I think DR chandeliers are a stand alone piece usually bought to be the star in the space and do not need to "go with" any other lighting.