I love a good red wine. It is made from dark-colored grapes.
Does that mean that white wine is made from light colored grapes? 
Yes, it is made mainly from "white" grapes, which are typically green and yellow.
That makes sense. Do you know anything else about the winemaking process? Do people really stomp on grapes with their feet to get juice out?
In the past, pressing the grapes was done by feet. However, most wineries use a crusher instead.
That's probably a lot more effective. My favorite wine varietal is rose. Is that made from red or white grapes?
I love rose. It is made with same grapes as red, but does not include enough of the skin color to be considered a red wine.