To mix chromium oxide green (#4B6A3B) in watercolor, use 89% Viridian Green, 6% Burnt Umber and 5% Raw Umber. Chromilla's model predicts a 92% dry match against the target, scored against its own color model, not a measured paint-out. Chromilla is a web-based paint color mixer that turns any color, from a photo, the camera or a hex code, into exact paint-tube ratios for acrylic, oil and watercolor, using Kubelka-Munk pigment mixing and aiming at the color after it dries.
Target
Chromium Oxide Green
#4B6A3B
Predicted dry result
92% match when dryMix to #4B693B while wet. It dries to about #446138.
| Paint | Pigment | Share | 100 ml batch |
|---|---|---|---|
| Viridian Green | PG18 | 89% | 89 ml |
| Burnt Umber | PBr7 | 6% | 6 ml |
| Raw Umber | PBr7 | 5% | 5 ml |
How we calculated this: Kubelka-Munk pigment mixing, then a per-medium dry shift, scored with CIEDE2000. Method and accuracy benchmark. Last checked August 2026.
Terms used here: Tinting strength, Dry shift, Kubelka-Munk, Delta E (dE2000), Pigment code, Gamut.
A dense, opaque, slightly gray green. Foliage without the buzz. This guide gives you the pigment ratios that land on #4B6A3B in watercolor, using the same solver that powers the Chromilla mixer.
Checked August 2026
Ratios calibrated for watercolor. Start with the dominant pigment, add the modifiers in the order below, and adjust in 5% steps to your target swatch.
1. Viridian Green
PG18
2. Burnt Umber
PBr7
3. Raw Umber
PBr7
Viridian Green, Burnt Umber, and Raw Umber, in roughly a 89:6:5 ratio.
Start with Viridian Green at about 89% as your watercolor base, then work in Burnt Umber and Raw Umber in the order above. Adjust in 5% steps until the swatch reads #4B6A3B.
Mixing Chromium Oxide Green yourself lets you approximate an expensive or hard to find tube from pigments you already own, match Chromium Oxide Green across paint brands whose factory tubes differ, and rebuild the exact color when you run out mid painting. The recipe above is the working starting point.
Overshooting on Viridian Green is the usual failure, add it in 5% steps and compare against the target between each pass.
Each variation is its own target (lighter and darker move OKLCH lightness by 0.08; warmer and cooler turn the hue 12 degrees toward red or blue), solved fresh.
#618251
9 parts Yellow Ochre, 8 parts Viridian Green, 2 parts Ultramarine Blue and 1 part Titanium White. Chromilla's model predicts a 90% dry match against the target, scored against its own color model, not a measured paint-out.
#355325
5 parts Viridian Green, 2 parts Ultramarine Blue and 1 part Cadmium Yellow. Chromilla's model predicts a 94% dry match against the target, scored against its own color model, not a measured paint-out.
#576732
75% Yellow Ochre, 21% Ultramarine Blue and 4% Cadmium Yellow. Chromilla's model predicts a 92% dry match against the target, scored against its own color model, not a measured paint-out.
#3F6C45
89% Viridian Green, 6% Ultramarine Blue and 5% Raw Umber. Chromilla's model predicts a 93% dry match against the target, scored against its own color model, not a measured paint-out.
Open the live mixer with Chromium Oxide Green + watercolor pre-loaded and calibrate to your tubes.
Pigment mixing is subtractive, so small ratio changes matter. The mixer refines this recipe to your brand and updates on the fly.