Why are these called white grapes and not green grapes?

@Byron8by7 But aren't white grapes and green grapes the same thing?

@SW-User The green "table" grapes in the above photo are most likely Thompson Seedless grapes, which aren't usually used for wine. "White" grapes, which are an entirely different variety, but in a similar shade of green, are used for making white wine, such as Chardonnay.

@Byron8by7 Oh wow I never noticed that