Santa Rosa's destination for hand-painted balayage, seamless blonding, and cuts that work between appointments. Sun-kissed, low-maintenance, and unmistakably yours.
Reserve your chairPricing varies with hair length, density, and the story your color needs to tell. Every service includes a consultation and a custom finish.
Hand-painted highlights with custom toner. Always done in a single session.
Lift, tone, treat. For the lightest, healthiest blonde possible.
Face-framing brightness and crown dimension. Perfect for refresh visits.
Seamless grow-out maintenance between full color services.
Single-process refresh or a complete color change.
Between-visits pick-me-up. Refreshes tone, adds glassy shine.
Consultation-driven cut styled to your daily routine.
Wash, blow-dry, and finishing style. No cutting.
Koi Salon is a small, focused studio in Santa Rosa. We specialize in the kind of color that grows out beautifully — sun-kissed, low-maintenance, and unmistakably yours.
Every guest gets a real consultation, a single colorist start to finish, and a formula we document so the next visit is even easier. We work with Redken, Olaplex, and Davines.
Marin trained at the San Francisco Institute of Color and spent six years in editorial work before opening Koi in 2021. She's obsessive about healthy hair and even more obsessive about the color you actually want to wear. Her specialty is hand-painted balayage on naturally dark hair.
Outside the studio, she photographs every transformation for the salon archive and walks her ridiculous labrador, Pippin, on the Spring Lake trail.
Real transformations from the chair. Every photo is taken under consistent lighting so the color you see is the color you'll get.
5-star rated on Google. 4.9 out of 5 across 312 reviews.
“Marin is a color genius. I came in with a brassy box-dye situation and left with the coolest, softest bronde I didn't even know I wanted. Six weeks in, it still looks like a fresh appointment.”
“First salon where the consultation actually felt like a consultation. We talked about maintenance, about how I style at home, about my budget. Walked out with a cut I can actually air-dry and not hate.”
“Marin corrected a balayage from another salon that had gone patchy orange. She spent three hours getting it right and refused to let me leave until it was perfect. That's the level of care.”
“I drive up from San Francisco every 12 weeks. It's worth it. Koi is the only place that has ever gotten my dark-to-light transition right without destroying my hair.”
Book online below, or send us a note with your goals and we'll reach back within one business day.
Tue–Fri · 9a–7p
Sat · 9a–6p
Sun · 10a–4p
Mon · Closed