Surgeons typically wear green or blue scrubs in the operating room. Green is the most traditional choice, but both colors serve the same practical purpose: reducing eye strain during long procedures involving blood and tissue. The specific shade varies by hospital, and some institutions assign colors by department, but green and blue remain the surgical standard.
Why Green Became the Surgical Standard
Surgeons didn’t always wear green. Up through the mid-20th century, surgical teams wore white, which matched the sterile image of medicine but created real problems in practice. White showed blood and other stains immediately, which was unsettling for anyone who saw the surgical team in hallways. More importantly, the combination of white uniforms, white operating room walls, and bright overhead lights caused significant eye strain for surgeons working hour after hour.
During the 1960s and 1970s, operating room staff began switching to green scrubs as a high-contrast but less visually intense alternative. The shift stuck, and green quickly became synonymous with surgery.
How Green and Blue Protect a Surgeon’s Eyes
The choice of green and blue isn’t arbitrary. It’s rooted in how your eyes process color. When you stare at one color for an extended period, the photoreceptors in your retina that detect that color become fatigued. If you then look away at a white or neutral surface, you briefly see a “ghost” of the opposite color. This is called the afterimage effect, and for a surgeon staring at red blood and tissue for hours, those afterimages can be distracting and disorienting.
Green sits directly opposite red on the color wheel. When a surgeon glances up from a red surgical field and sees green scrubs, green walls, or green drapes, the fatigued red-detecting cells in their eyes get a break while the green-detecting cells take over. This helps the eyes “reset,” keeping vision sharp and reducing fatigue over the course of a long operation. Blue works through the same principle, sitting close to green on the color wheel and offering similar relief from prolonged exposure to red tones.
Green vs. Blue: How Patients See Them
Both colors function well optically, but they send slightly different signals to patients. A study published in JAMA Surgery found that when patients were shown clinicians in various scrub colors, green was the color most strongly associated with surgeons. About 45% of participants identified the male clinician in green as the surgeon, and about 42% did the same for the female clinician. Green, in other words, works as a visual shorthand that tells patients “this person operates.”
Blue scrubs, on the other hand, scored highest on warmth. The male clinician in blue was identified as the most caring by nearly 57% of participants, and the female clinician in blue was rated most trustworthy at about 39%. Interestingly, a small number of participants associated green scrubs with janitorial staff rather than surgeons, suggesting the signal isn’t universal.
These perceptions matter more than they might seem. Scrub color is one of the first things a patient notices, and it can shape how comfortable they feel before a procedure. It’s a small, easily adjustable factor that contributes to the overall impression a surgical team makes.
What Different Colors Mean by Department
Outside the operating room, scrub colors vary widely and often follow hospital-specific dress codes rather than any universal standard. Some common patterns across many institutions:
- Green or blue: Surgery and operating room staff
- Ceil blue (light blue): Nurses in many hospitals
- Navy blue: Often worn by emergency department staff or physicians
- Wine or maroon: Sometimes assigned to respiratory therapists or lab technicians
- Pink or patterned prints: Common in pediatrics and labor and delivery units
These assignments are not standardized across the healthcare industry. One hospital might dress its nurses in royal blue while another uses dark green. The color-coding exists primarily so that staff and patients can quickly identify who does what on a busy hospital floor. If you’re at a specific hospital and want to know what each color means, the information is usually posted or available at the front desk.
Why Scrub Color Still Varies by Hospital
Despite the optical advantages of green and blue in surgery, there is no national or international rule requiring surgeons to wear a specific color. Individual hospitals and health systems choose their own color-coding systems based on a mix of tradition, branding, department identification, and practical considerations like stain visibility. Some surgical teams prefer darker shades of blue or teal because these hide stains better than lighter colors while still offering the same visual relief from red tones.
In teaching hospitals and academic medical centers, you may also see color used to distinguish between attending surgeons, residents, and medical students, all of whom might be present in the operating room during a single procedure. The specifics change from institution to institution, but the operating room itself remains dominated by shades of green and blue for the same reasons it has been since the 1970s: they keep surgeons’ eyes fresh and their focus sharp.