Personally, I like the black. Not just because it'll match, but I think it looks good against your cabinets. That said, there is nothing wrong with mixing - especially black and ORB. In my kitchen, we have burnished, aged copper fixtures, but for the hardware I went with the brighter copper, and it looks fine. I just went through this in the bath. Finally decided on brushed nickel so at least the faucet and light fixtures would match. Yes, I've been accused of being "matchy", lol.

I am no help with colors, but I will advise you to prime the oil painted fixtures before painting them with latex paint. I once lived in a house with all oil painted walls. Back then, you had to prime them with oil-based primer to switch to latex paint, or the latex would simply peel off in time. Since I could not breathe oil paint fumes, there was no way for us to paint the house interior! Nowadays, I believe that latex primer will do the trick.

The picture size is fine, just lower it. Keep the plant. Remove those smaller items from the console & place a lamp there. I think those shades look oppressive & very dark brown. Any way you can replace them with something in a lighter, woven look? I love the paisley rug. It looks BoHo to me so I feel the light fixture is not quite right. It might work better if you lower it a bit? I have mixed feelings about chair pads. Most look messy & ill fitting. I think pads can add color with the right fabric in a pattern that mixes with the rug but that may require custom work. No runners or place mats on the table unless you like to use a place mat while dining. Otherwise, leave the table bare with the exception of a larger single item in the middle. The vase you have now is too little. If you want to bring in more color, add art to another wall. I think rooms with only 2 colors are boring & you essentially have blues & creams. Lots of colors go with blues...I'd look for something with green in it. I like the green color in the vase you now have on the table. Perhaps art work with green in it or a larger table item that is green?

What a beautiful space! I don't see your living area as needing to be updated, as it all seems to complement and flow well. I love the rustic elements. If anything, I would consider painting the built ins the same as the kitchen cabinets, or perhaps a shade darker. I think the mantel is perfect.