In many cases, the abnormal color or consistency of the semen may be the result of a possible medical cause. If the color of the semen is yellow, green or gold, it may be the result of a prostrate infection. Thick, lumpy or jelly-like ejaculation may be the result of a hormonal deficiency. Pink, red, or dark brown ejaculate can indicate the presence of blood and may result due to bleeding in the prostrate.