I talk a little about color stacking on the Teams page of the wiki. While I was putting that page together, I also started this surprisingly popular thread here on the forums, if you’d like to look a little more in depth into ways peoples tend to color stack. I personally prefer a 3-2 stack with the 3 countering the enemy tank and the 2 providing strong support or countering an enemy flank.
It’s pretty common and surprisingly effective. 