You have great ideas from several people. If you paint anything it should be as Paul suggested.
Before pulling out the paintbrushes, do the other suggestions - a better window treatment, a black over-the-island light (or wicker), and add some useful accessories to the island countertop.
I would buy ONE brass handle that fits your existing holes and see if that change will make the room more cohesive.
One thing at a time. Just getting a window treatment that adds color (or a bit more black) might work.
I love how your kitchen looks. You did a great job on the hard part.
Q