According to this
reference:
The colour of semen does change as does its texture. Generally
speaking however it should be pearly white not dissimilar to raw egg
white. Old blood turns brown and you may have suffered from a blow to
the testicles earlier on. Badly designed bicycle saddles on mountain
bikes are a prime suspect. You could also have suffered an infection
which can cause slight bleeding into the semen.
Prostatitis,
inflammation of the prostate or an enlarged prostate can also bleed
although the blood is generally red in colour. Finally testicular
cancer can make its presence felt in this way so it makes sense to get
it checked by your own doctor sooner rather than later.
Let me know if you need more input. If not, thanks for the
opportunity to assist you... I would really appreciate your honoring my
efforts by 'pushing the button' and Accepting this answer. Adding
a bonus -- should you wish to do so -- is always warmly welcomed.
Good Luck!
Steve
Counselor /listener/collaborative problem solver. Thanks!