All of these are from the glasstilestore. It's difficult to see what colors would exactly match your kitchen. Here are some ideas.

Another

Another...

What other colors are in your house/kitchen?

Thanks Teachertile. The kitchen walls are painted SW jersey cream which is a pale creamy yellow. The rest of the house is mostly earth tones with some blue accents.

Everyone has different tastes, so my choices will reflect mine, like teacher's reflect his. You need to figure out what you like. It can help to look at your choices on a sort of a mood board, then I think you should spend some time on houzz. Search for espresso cabinets and look at the images that come up with similar counter surfaces to yours. Just browse for a while and stop when you find an image that is beautiful to you.

And it'll give you a chance to come up with a budget in $/sf. Without a budget, looking for tile is a waste of time.

Here are your materials:
Silestone Minerva Cream

I really think honey onyx and shell tiles would look pretty with your colors. The tiles below are possibilities I would consider. Good luck!

shell tile mosaic, around $30/sf

honey onyx and Thassos marble mosaic, around $50 for a 13" x 13" sheet of tile

honey onyx and Thassos marble diamonds, around $30/sf

honey onyx hexagons, around $16 for a 10" x 11" sheet

ceramic diamonds, $44 for a 10" x 11" sheet

I love the shell tile! I would suggest going to a tile store and bringing home several samples. Even ones you are not sure about.

What's your budget and what's your preference--more modern (eg glass mosaics?) or more traditional/rustic (tumbled marble and the like) or in between?
Backsplash.com has a nice backsplash designer where you can 'try out' different looks with a variety of cabinets color/designs and counter tops. Although they do not have your countertop, they have granite which is somewhat similar (try ivory fantasy)

Here is a link that might be useful: backsplash designer

Hm, if you're all set to rip out the current tiles (however, 6x6 tiles seem to be making a comeback), I'd look into a backpainted glass backsplash. In my area, it's possible to locally buy custom cut tempered glass for not a whole lot of money. They will even cut in outlets.

Here is a link that might be useful: DIY glass backsplash

Just saw that glass tile not to your liking. What about a glazed or crackle subway tile in a cream or light brown color, warmer than your current tile? I have fallen in love with the Grazia Rixi tile, but Jeffrey Court also makes a beautiful crackle tile (as does Encore, but its too $$$ for us). Subway format would update the kitchen a bit without being too modern and certainly not too busy. Glaze/crackle would add a bit of visual interest but again, not too busy. If you like the look of natural stone, you could also look at a travertine tile. I googled espresso cabinets and travertine backsplash and saw a variety of nice things.

Here is a link that might be useful: grazia tile .

If you like the shell pattern, consider looking at Walker Zanger "Waterfall" in Woodridge Pearl.