There was a famous 'gaff' by commentator Ted Lowe, who said: "Steve is going for the pink ball - and for those of you who are watching in black and white, the pink is next to the green."
Worth noting that this sounds like a joke or a gaffe, but might have been a very reasonable thing to say. Assuming the green was on or near its spot (its starting position), which is likely, every snooker fan would know which ball was the green.