function lift(color, level) {
	        var colorArr = parse(color);
	        if (colorArr) {
	            for (var i = 0; i < 3; i++) {
	                if (level < 0) {
	                    colorArr[i] = colorArr[i] * (1 - level) | 0;
	                }
	                else {
	                    colorArr[i] = ((255 - colorArr[i]) * level + colorArr[i]) | 0;
	                }
	            }
	            return stringify(colorArr, colorArr.length === 4 ? 'rgba' : 'rgb');
	        }
	    }
@param {number} normalizedValue A float between 0 and 1.
@param {Array.<string>} colors Color list.
@param {boolean=} fullOutput Default false.
@return {(string|Object)} Result color. If fullOutput,
                          return {color: ..., leftIndex: ..., rightIndex: ..., value: ...},
@memberOf module:zrender/util/color