get the color of this card at x,y

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I am looking for a function that does something like this:
get the color of this card at x,y
 and I would expect it to contain r,g,b

I have searched through the Revolution Dictionary, and the best I can find is mouseColor. This has the undesirable effect of having to move the mouse to the point I am checking, and the possibility that the user is jerking the mouse and I get the wrong color. Any ideas on how to accomplish this would be appreciated.