Urine test results should always be interpreted using the reference range provided by the laboratory that performed the test, or using information provided by the test strip/device manufacturer.[3][4] Color See also: Urine § Color Color change in Urine indicating Well hydrated, Dehydrated, and Extremely Dehydrated. The following are examples of some urine colors and their causes (not a complete listing). Nearly colorless: Excessive fluid intake for conditions; untreated diabetes mellitus, diabetes insipidus, and certain types of nephritis. Yellow: Distinctly yellow urine may indicate excessive riboflavin (vitamin B2) intake. Yellow-amber: Normal. Yellow-cloudy: excessive crystals (crystalluria) and/or excessive pus (pyuria). Orange: Insufficient fluid intake for conditions; intake of orange substances; intake of phenazopyridine for urinary symptoms. Red: Leakage of red blood cells or of hemoglobin from such cells; hemolysis; intake of red substances.