If I wanted a slightly lighter color, could I stretch this to 3 60lb bags?

Typically, each 10 fl oz bottle of QUIKRETE® Liquid Cement Color will color up to 2 bags (of 60 lb or 80 lb each) of gray base product. Using less will lighten the color. It may also change the hue.The QUIKRETE® Liquid Cement Color must be blended with the clean mixing water before adding it to the dry mix cementitious product. Please note that variations in mixing water amount, mixing time, curing conditions, and finishing techniques will cause color variations. We strongly recommend trialing small batches to experiment and evaluate the color after at least 24 hours to determine if the color is acceptable before initiating a full scale project.