a lot of it depends on the other colors you have in your kitchen ,not just the color of the tile ,the reason i say this is many times well 3 out of 7 tile jobs my wife has had to take the grout back and get a different color,if you have reddish countertops for instance you might choose a grout that is brought out more by them,it truly is a personal preference,heck i even did my office floor with a grey grout and the tile colors are green and an off white pattern.i thought no way but wife said try it and lo and behold it was perfect.the countertops and accent wall color can be used to help choose a grout color,but for every designer you asked there would probably be a different color or variation there of.that is why there is so many grout colors,ps. you can always change the grout color after a year or two if you get bored with it by using a colorant.good luck and happy grouting!!!
The last of the big spenders,world traveler,international jetsetter,Oil wells drilled,wars started,Virgins converted,Governments overthrown,Revolutions started,governments run,EX_WIVES HOUSEBROKEN,(NO warranty on this last service due to low success rate)PS.That Petrol in your car probably came from a hole in the ground I drilled!! MARVIN DIY'selfer Extroidanare!!!