function hsl2rgb(hsl) {

	function hue2rgb(p, q, t) {
		if (t < 0) t += 1;
		if (t > 1) t -= 1;
		if (t < 1 / 6) return p + (q - p) * 6 * t;
		if (t < 1 / 2) return q;
		if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
		return p;
	}

	var h = hsl.h, s = hsl.s, l = hsl.l;
	var r, g, b;

	if(s === 0){
		r = g = b = l; // achromatic
	}else{

		var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
		var p = 2 * l - q;
		r = hue2rgb(p, q, h + 1 / 3);
		g = hue2rgb(p, q, h);
		b = hue2rgb(p, q, h - 1 / 3);
	}

	return {
		r: Math.round(r * 255),
		g: Math.round(g * 255),
		b: Math.round(b * 255)
	};
}
Converts an HSL color value to RGB. Conversion formula adapted from
http://en.wikipedia.org/wiki/HSL_color_space. This function adapted
from http://stackoverflow.com/a/9493060.
Assumes h, s, and l are contained in the set [0, 1] and
returns r, g, and b in the set [0, 255].

@param   Object  hsl     HSL as h, s, and l keys
@return  Object          RGB as r, g, and b values