Oxide of Chromium
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Oxide of Chromium
#6B8E23 · click to copy
Earth
HEX
#6B8E23
RGB
107, 142, 35
CMYK
25%, 0%, 75%, 44%
Pigment
PG17
Lightfastness
Excellent (I) — among the most permanent pigments known
Moods & Keywords
permanent opaque earth green
Pigment & Material
PG17 Synthetic
Chromium sesquioxide (PG17). Extremely opaque, muted, permanent. One of the most stable pigments — used in camouflage paint, currency printing, and anywhere absolute permanence is required.
⚠️ Toxicity: Low — chromium(III) oxide is non-toxic; differs from toxic hexavalent chromium (Cr VI)
☀️ Lightfastness: Excellent (I) — among the most permanent pigments known
Origin & History
Chromium oxide green was introduced to artists in the 1860s and quickly became valued for its extraordinary permanence. Unlike the fugitive plant-based greens and the somewhat unstable copper-based greens of earlier painting, chromium oxide offered a permanent, non-toxic alternative. Its dull, earthy quality was initially seen as a limitation but later valued for its naturalistic, matte character.
Also Known As
Chromium Oxide Green Chrome Oxide Vert Oxyde de Chrome Opaque Green
Psychology
Solid, permanent, and military. Chromium oxide is the green of endurance — dull enough to be non-threatening, permanent enough to outlast everything else. Its association with military camouflage and institutional paint gives it a utilitarian character. Used in painting, it creates greens of extraordinary solidity and earth-connection.
In Culture
Chromium oxide green is used in camouflage paint systems for military vehicles and equipment worldwide — its specific spectral properties help equipment blend with vegetation in infrared imaging as well as visible light. The colour's association with the military has made "army green" or "military green" near-synonymous with chromium oxide's particular dull, opaque green.
Natural Sources
No natural source for the specific pigment — chromium oxide (Cr₂O₃) occurs naturally as the mineral eskolaite but is primarily produced synthetically by reducing sodium dichromate. Chromium was discovered in 1797 by Louis Nicolas Vauquelin.
Making It Yourself
Chromium oxide green is synthesised industrially — not available for home production.
On the palette: it is the most opaque and lightfast of all greens — useful where permanence and opacity are required.
Mix with yellow ochre for olive green.
Mix with raw sienna for warm earth green.
Note: it has a characteristic dull, earthy quality — sometimes called "army green" or "military green."
Art Movements
Academic Painting Military Art Fresco Contemporary Realism
Famous Works
Used in fresco painting for its stability in alkaline lime environments
Military landscape painting broadly
Contemporary realist landscape work
Available As
Winsor & Newton — Oxide of Chromium (PG17)
Daniel Smith — Chromium Oxide Green (PG17)
Golden — Chromium Oxide Green
Sennelier — Oxide of Chromium
Colour data compiled with AI. Spot an error or have more to add? Leave a Note — ekphra reviews and updates.
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