One thing that has bothered me lately is the spelling of grey. Traditionally, I have always spelled it "grey" with no problems with any electronic spellchecks. Unfortunately, for some reason the Unix American English dictionaries do not include "grey" in their listings, preferring instead "gray." While my mind has no problem recognizing both of these words as representing a color that is somewhere between black and white, when I write, I always write the word "grey."
While "gray" has more hits on Google than "grey," DJ Danger Mouse is of a similar mindset. In general, it would seem the global population is conflicted, as can be seen in the Wikipedia article on grey/gray, especially the section on Web Colors.