jQuery.rgbToHex.js

/**
 * jQuery.rgbToHex - Converts an RGB string to a HEX string (forces length 6)
 * @author Joshua Baker
 * @version 1.0.0
 */
;(function($){
	$.extend({
		rgbToHex: function(rgbString) {
			var parts = rgbString.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
			if ( ! parts) {
				if (rgbString.length < 6) {
					var parts = rgbString.split('');
					delete (parts[0]);
					for (var i = 1; i <= 3; ++i) {
						parts[i] = parts[i] + parts[i];
					}
					return '#' + parts.join('');
				}
				else {
					return rgbString;
				}
			}
			else {
				delete (parts[0]);
				for (var i = 1; i <= 3; ++i) {
					parts[i] = parseInt(parts[i]).toString(16);
					if (parts[i].length == 1) parts[i] = parts[i] + parts[i];
				}
				return '#' + parts.join('');
			}
		}
	});
})(jQuery);