Forensics What color is sperm under UV light? February 4, 2026 by Tanp | Leave a Comment Sperm is typically fluorescent blue or white under UV light due to the presence of proteins and other compounds that emit light when exposed to ultraviolet radiation. This phenomenon is often used in forensic science to detect the presence of semen at crime scenes. What Causes Sperm to Glow Under UV Light? Semen contains fluorescent […] Read more ยป