If the urine colour is not brown after drinking a litre water, does that mean kidneys are okay?

Normal urine color . Ranges from pale yellow to deep amber depending on concentration. Dark brown/tea-colored urine may result from eating fava beans, rhubarb, aloe. Some drugs can darken urine (chloroquine, primaquine, metronidazole, nitrofurantoin, laxatives w/ cascara or senna, & methocarbamol). Some liver & kidney disorders can turn urine dark brown, as can some urinary tract infections. If concern consult doctor.