The color presentation of blood urine on a tissue can be very different and has errors. If you drink a lot of water, you can see blood urine with a very light color to the naked eye. If you wipe blood urine on a tissue, it can be colorless or light red. Often high protein diet with hematuria, urobilinogen and urobilin in the blood will mix with red blood cells in the urine, and brownish yellow-like hematuria will be visible to the naked eye, and if the hematuria is wiped on a paper towel, it may make the paper towel appear brown-like in appearance. If myoglobinuria or hemoglobinuria can have a red appearance, wiping it on a paper towel may give the paper towel a red wine or soy sauce color appearance.