I am white, but I thought of taking a look at the other groups here out of curiosity, and this thread called my attention, that's why I'm replying.
Now, we have groups for the three main human races - white, black and asian.
We don't have groups for each and every single sub-race, probably because each of them are a part of either one of the three main races - after all, what counts the most in determining one's race are the genes one has in largest quantity.
For example, Indians. In most indigenous tribes, we see people who have mostly Asian traits. So even though they are mixed, I think they can be considered part of the Asian race - even though they are not from Asia. Perhaps another term for the Asian race, such as "yellow", fits them better regardless of native region.
Now I just looked up "Dravidians", and they do look like they have mostly black genes in my opinion. So I would say they are part of the black race.