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Report Abuse. The colors on the urine testing strip indicate the different concentrations of sugar in the urine. for example, the dark brown shade indicates highest concentration(++++),whereas light blue indicates nil sugar in the urine.There are other shades inbetween indicating 1/2,1,1 1/2 percent sugar.eport Abuse. The colors on the urine testing strip indicate the different concentrations of sugar in the urine. for example, the dark brown shade indicates highest concentration(++++),whereas light blue indicates nil sugar in the urine.There are other shades inbetween indicating 1/2,1,1 1/2 percent sugar.
If the urine is cloudy and red it indicates that there is blood in the urine. 1  Dark red or brown urine: Indicates blood in the urine. 2  Yellow-brown, greenish: yellow, dark brown, foam: may indicate some type of liver problem. 3  Pink, blue, other colors: may be due to drugs your cat is taking.