Should the female urethra be white?

You probably should have that examined and probably biopsied. It means if you now see white there is a change and at an advanced age chances of cancerous changes are higher. It is also possible that fuzzing from bacteria overgrowth, like the tongue, may also do that.

urethra is the tube which transports urine from the bladder to outside and cant be seen. Its mouth (meatus) can vary in color from dark/pink/whitish -depending on skin color