Final answer:
The color of urine can indicate various conditions. Dark red and bright red urine may be caused by blood in the urine, while dark yellow urine can be a sign of dehydration. Green urine is not normal and may indicate a medical condition or the consumption of certain foods or medications.
Step-by-step explanation:
The color of urine is determined by the breakdown products of red blood cell destruction. Dark red urine could indicate the presence of blood in the urine, which could be caused by a urinary tract infection or a kidney stone. Bright red urine may also be a sign of blood in the urine, often caused by a urinary tract infection or a kidney stone. Dark yellow urine can be a result of dehydration, while green urine is not a normal color and may indicate a medical condition or the consumption of certain foods or medications.