ANSI escape sequence on the server. CSS rgb(...) color in the browser.
function(r,g,b){
		return {
			server: 16 + r*36 + g*6 + b,
			client: "rgb("+[
				(r*42.5)|0,
				(g*42.5)|0,
				(b*42.5)|0,
			].join(',')+")",
		}
	}