Well do you need it actually like an icon with borders? Or just the color of the player? If you just need the color, try replaceabletextures\teamcolor\teamcolor00.blp.
The 00 is red, and it goes on, so the color is the player number - 1 (teal is 02), and 12 through 15 are all dark gray colors. If you actually need borders, I can try to do that for you. But also....I don't think this is the right forum category to ask this question.