For both diabetics and those without diabetes, changes in urine color could signify a variety of causes ranging from insignificant, temporary conditions to serious underlying conditions, according to Diabetes Self-Management. If the smell of urine is particularly sweet, excess glucose might be present and indicate diabetes.
Color changes in urine often are caused by foods consumed or by medications, though color changes sometimes result from infection or a serious health condition, notes Diabetes Self-Management. Other changes in urine are important for diabetics to note, explains the American Diabetes Association. Increased levels of the chemical ketone in the urine indicates a shortage of insulin, which is a dangerous condition affecting diabetics. Ketone strips are available to test one's urine at home.