With a granite backsplash, you'll still have a seam so it defeats the purpose stated by that granite guy. Only time I see tile over a 3" granite backsplash is when they are done at different times (change in homeowners or you decide to add tile in the future). Most people getting new counters will just tile from the counter up.

Also, the kitchen is small and does not look to have the typical 18" high space between counter and upper cabinets. While the herringbone is beautiful, I think you needs some height so you can truly appreciate the pattern. You'll probably want to go simpler in a warmer white tile. I'd be inclined to select something more vertical in design to draw the eye upwards.

I would go to a couple of tile stores and buy samples in both green and a creamy white. Were you planning on painting and getting a new window treatment? I would order samples for the window treatment and paint and see how it all coordinates. It took me many, many samples, and 5 tile stores to find the warm white subway I am using. Sounds silly but each one had a different color and tone.......don't even get me started on how many samples I ordered for the roman shades.

you are going to have to deal w the counter as far as coordinating things. I guess whoever did the blue paint wasnt ready to put up a splash so they used color contrast which in a way has worked. You may need to bring in tile samples as I dont think coordinating everything cabs/counters and tile will be especially easy. White tile in a subway is always a default but with the counters it will just be okay. if you want to match up w counters it looks like creams and/or grays so you just have to find the right one. maybe a light cream but then you are playing into the yellows so much...but you may find something. leave the teal paint until you have time to do this search. decorative small plates or mini pictures botanical themes can be aligned along the teal temporarily for whatever reason you think it's OFF. take it light- heartedly. note narrow ledge for use/ pegs for mugs etc....more use. something like these if it were mine and I was uncertain and the right tile doesn't emerge. way over on right above the narrow counter put some pegs for mugs....above sink a ledge ....etc.