Violet-I'm going out on a limb here, but I suspect you could get violet or purple urine if you combined beets with methylene blue. Blue-Methylene blue will turn your urine blue or greenish-blue. It can also color the whites of your eyes blue.The coloration of both urine and eyes is reversible.iolet-I'm going out on a limb here, but I suspect you could get violet or purple urine if you combined beets with methylene blue. Blue-Methylene blue will turn your urine blue or greenish-blue. It can also color the whites of your eyes blue.