YELLOW! Maybe you are Chinese?
Joke : What song does 4 million Chinese sperm sing?
"We all rive in a yerrow submaline.... a yerrow submaline.... a yerrow submaline....We all rive in a ....."
Okay seriously - its normal. I copied this from :
www.tiscali.co.uk/lifestyle/healthfitness/ menshealth/part1_3-2.html
(I hope the link works)
It is a British source.
I cut and pasted this from there:
"Fresh semen is a thick, milky, turbid, white-yellow fluid with a slight opalescence. It is permeated with sticky, glass-like fibres and contains granules resembling sago or tapioca. Yellow pigments (flavines) derived from the seminal vesicles are often seen as coloured streaks.
Initially, semen is thick and clotted. It almost immediately coagulates due to a reaction between an enzyme from the prostatic secretions (proteinase, or clotting enzyme) acting on a sticky protein within the seminal vesicle secretions. The semen then forms a thick, gelatinous clot. This is thought to be an evolutionary remnant. Semen in many promiscuous lower animals clots to form a cervical plug. This effectively blocks the female cervix and prevents semen from another male impregnating the female. "
I also vouch that this is credible information based on my schooling and clinical experience.