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I really like your kitchen. Not sure I would do copper pulls though. Brushed nickel would look nice with your appliances.

Your kitchen is plenty warm! If you're changing stools, go with something in a bright color, either the stool itself or cushion. I'd keep the silver hardware, it goes better with your appliances. Bright and patterned textiles, bowls for fruit, countertop appliances will also add color. By keeping the bones of the kitchen neutral, you can change up the decor on whim, or with the seasons, or holidays. It's a beautiful kitchen, so far!

Complete the kitchen first as planned, it will appear completely different at that point anyway. I don't think there will be any lack of warmth and you clearly are not clueless of design.

Just needs some warmth and texture. You can add warm accent colors in red/orange family. You can add texture in your backsplash. Check this article out:

https://www.houzz.com/magazine/new-this-week-these-graphic-backsplashes-pump-up-white-cabinets-stsetivw-vs~86332653

What about matching your cabinet knobs to the sink faucet? And I think a backsplash will complete the space. Looks great to me! Did you just have this built or remodel the existing cabinets?

I like the colors, just put in a nice backsplash for contrast

Gorgeous kitchen! I agree with others - choose silver or a dark tone like your sink faucet for the pulls/knobs. Add some color and warmth with big artwork on the wall directly opposite the kitchen.

The backsplash is going to make all the difference in the world in your kitchen. I like this combination with taupe cabinets...slightly darker taupe arabesque tile with bright white grout. Notice the silver handles, too. Ties everything together.

You have a beautiful kitchen. While I like copper color and satin gold, in this case I would go with a brushed nickel.
An interesting back splash will make a big difference

What do yo have planned for a backsplash? What kind of granite do you have? I think an antique black knob would help add some weight to the cabinets.

I agree with others that copper isn't the right metal for your kitchen. And I for sure agree you shouldn't be worried yet! You are on a good path and it will work out fine. You're having the classic mid-remodel panic. Had it recently myself lol. Focus on choosing a beautiful backsplash and some great hardware and you'll be fine.