The 181 number is actually 281. That's what typing left handed and copious amounts of prescription pain medication gets you. Sorry about that.
As for breaking it down into what color killed what color, as if there's something meaningful to be gained by that, I have no idea if such a thing is even tracked, nor do I care. It seems to me the issue is the number of blue people killing people who aren't.
Of the dead people, killed by the blue people, what number does it need to be before it hits the threshold of Too Many?
I've got a reeaally low number in mind.