Grout Color

Need an opinion. I have installed 1 inch x 2 inch sky blue crackle tile on my kitchen backsplash. What color grout should I use? It is my first tile job and it came out pretty good. Some grout lines not that straight. We want to highlight the tile and have the tile be the first thing you see and not the grout (or any mistakes I may have made!). Corian countertops are mottled gray (mostly) with some blue. Cabinets are clear unstained maple.

Match the color of the grout with the base color of the tile if you don't want the errors to slap you in the face every time you look at it.