Blue urine can be due to the presence of dyes. Dyes are mostly given while doing tests to evaluate how well your kidneys are functioning.
Naturally urine is slightly pale yellow in colour. This coloring is primarily caused by the pigment urochrome, also known as urobilin. Hence, there is nothing to worry.
It means either you are drinking a lot of water or you are having a viral infection. You are recommended to consult with a doctor if you continue to pass white urine.
Diluted urine is usually pale yellow or transparent in colour. However, it does not give accurate results.
The doctor will check your water intake. If your water intake is less than normal then doctor will recommend you to increase your water intake.