Do they also make brandy from red grapes?!
Answers: Brandy is distilled from wine. You can use any type of wine in the process. Just as an aside, you can make white wine from red grapes, as well. It turns out the colour of the wine comes from the amount of time the grape juice is exposed to the skin and pulp of the grape. If you squeeze red grapes and immediately seperate the juice from the pulp and skins, you can make white wine from the juice.
All kinds of grapes. The color does not matter.
No matter what kind of wine you're referring to, the grapes themselves are almost always red. The color of a wine comes from the skins. When wine is fermented, a winemaker leaves the skins in with the crushed grapes. The color from the skins (along with the tannins -- which make a wine dry) leeches from the skins, coloring the wine. Also, fortified wines (like brandy), cognacs, etc. get color from the barrels in which they're aged.
The colour of the grape is irrelevant. However brandy does not even require grapes you can use fruit.