What Color Should You Avoid When Deer Hunting?

Short answer: blue. Deer see blue and ultraviolet wavelengths far better than humans do, so ordinary blue jeans and UV-brightened laundry stand out sharply — especially at dawn and dusk when ambient light skews blue and deer move most. Full research breakdown in our guide to camouflage attire and deer vision science.

This is a genuinely useful, somewhat counterintuitive answer, since most hunters spend far more mental energy worrying about blaze orange than they ever spend thinking about the ordinary blue clothing many of them wear without a second thought.

Why Blue Is the Real Concern, Not Orange

The 1992 University of Georgia deer vision research, led by Dr. R. Larry Marchinton and Dr. Karl V. Miller alongside vision scientists from the University of California and the Medical College of Wisconsin, confirmed deer are dichromats — they see the world primarily in blues and yellows. That means their sensitivity to blue wavelengths is genuinely heightened compared to human vision, not dulled the way their red-orange perception is.

Why Dawn and Dusk Make This Worse

That blue sensitivity peaks specifically at dawn and dusk, when ambient light naturally skews toward the blue end of the spectrum — which happens to be exactly when deer move most actively. A hunter wearing ordinary blue jeans during prime early-morning or late-evening hunting hours is presenting exactly the wavelength a deer's eyes are most attuned to detect.

The UV Problem Hiding in Your Laundry

Most household detergents contain optical brighteners designed to make fabric look whiter to human eyes. Those brighteners reflect UV light, and because deer eyes lack the UV filter human eyes have, they detect this UV reflection readily. Researchers disagree about exactly how strongly treated clothing 'glows' to a deer, but the practical advice is consistent: wash hunting clothes in a detergent without optical brighteners, and don't run your camo through the same wash cycle as your regular, brightener-treated clothes.

Why This Doesn't Apply to Blaze Orange

It's worth contrasting this with blaze orange, which deer perceive as a dull, muted shade rather than an alarming bright colour, since they lack the long-wavelength cone that would make orange stand out. Blue sits at the opposite end of the spectrum from orange, which is exactly why it deserves more hunter attention than it typically gets.

Practical Steps to Avoid the Blue Problem

Simply avoiding blue denim and blue-toned base layers in favor of earth-tone or camo-pattern clothing removes most of the risk. Combined with brightener-free laundry detergent for your hunting-specific clothes, these two small adjustments address the actual colour science rather than the more commonly worried-about orange concern.

Pairing Colour Awareness With Overall Concealment Strategy

Avoiding blue and UV brighteners is one piece of a broader concealment approach that also includes outline-breaking pattern and, most importantly, staying still — the combination gives you the best realistic odds of a clean, undetected approach, setting up the shot placement and recovery process covered in our guide to how much does a buck weigh once the hunt is successful.

Why Small Habit Changes Compound Over a Season

No single piece of gear or single habit change guarantees success on any given hunt, but small, evidence-based adjustments — brightener-free detergent, background-matched pattern, disciplined stillness — compound together over a full season's worth of sits, meaningfully shifting the odds in a hunter's favour across many individual opportunities.

Quick FAQ

Does denim specifically matter, or any blue fabric?

The concern applies to blue wavelength reflection generally, so any blue-toned fabric — not just denim specifically — carries the same theoretical risk under deer vision science.

How do I know if my detergent has optical brighteners?

Check the product label or ingredient list for terms like 'optical brightener' or 'fluorescent whitening agent'; many outdoor-specific or scent-control detergents are formulated without them specifically for this reason.

Does this blue-sensitivity concern apply to other big game species?

The specific research discussed here focuses on whitetail deer vision; other species may have different colour perception profiles, so this exact concern shouldn't be assumed to transfer automatically.