function getColorObj(value, mode) {
		if (value[0] === "#") { return parseHex(value, mode); }
		else { return parseRgbOrHsl(value, mode); }
	}
Called before a property is updated by the tween.
See {{#crossLink "SamplePlugin/change"}}{{/crossLink}} for more info.
@method change
@param {Tween} tween
@param {TweenStep} step
@param {String} prop
@param {any} value
@param {Number} ratio
@param {Boolean} end
@return {any}
@static