VBGamer

When you say the Vertexs can have a colour, how does that work? I've always thought of a vertex as being a 0 volume point, how can nothing have a colour? So if I had 3 vertexes, with a face connecting them all (ie a triangle) and I made one vertex Red, one Green and one Blue, what would my triangle look like? (I can tell it is something really simple, like rtfm, but I'm too lazy =)