Converts an object representation of an RGB color to a hex string

rgb_to_hex.js

/**
* Takes an RGB object and converts it into a hex string
*
* @param {Object} RGB Colors {r:255, g:255, b:255}
*/
var rgbToHex = function(rgb) {
	var hex = rgb.b | (rgb.g << 8) | (rgb.r << 16);
	return hex.toString(16); // 'FFFFFF'
};