"I do not like gray at all."

Translation: Cha toil leam glas idir.

[FiferWD]

In English, when is grey gray and when is gray grey? Better, when is glas grey and when is it gray?
Seriously, I have been speaking English since childhood, and have never understood the difference.

[SarahBayley]

"Gray" is the standard spelling in American English; "grey" is either the standard spelling or at least more common in British English.