I do a band of copper with oak trim, which matches the rest of the kitchen and ties it all together. And we found this midnight blue subway tile to go behind it. It looks kind of boring gray without any direct light on it but we have some undercabinet lighting that will make them shine. And at the same time illuminate every little flaw, defect and error for all the kitchen to see. But it will bring out the color! Have no doubt.
That metal edging is called Schluter. If you’re installing tile on a wall, you want Schluter. Gives it a nice finished edge.