The colour of the sperm doesn't define its quality. You could be as fertile as ever despite the watery semen. If fertilty is your concern go and ask your doctor to have it tested.
You are not less man if the colour is a bit less white but it looks bad if you are a professional p**rn actor :sobbing:
As I said some time ago when I was taking Pumpkin seed oil my sperm was much thicker and dense but it could have been a coinicidence.