Arsenic
Also known as: Cool Operator’s Overalls , Winter Way , Chimney Smoke , Nightshade
As a rich take on blue, Arsenic carries cool and professional energy that suits corporate branding and SaaS products. Set it against a brown accent when you want the combination to pop. On white it reads clearly at 9.93:1 contrast, safe for body text under WCAG AA.
Reference
Arsenic color codes
- HEX
- #3B444B
- RGB
- rgb(59, 68, 75)
- RGBA
- rgba(59, 68, 75, 1)
- HSL
- hsl(206, 12%, 26%)
- HSV
- hsv(206, 21%, 29%)
- CMYK
- cmyk(21%, 9%, 0%, 71%)
- LAB
- lab(28.2 -2.5 -5.5)
- OKLCH
- oklch(38.1% 0.017 241.4)
Analysis
Color intelligence
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Gamut
The full range of colors a device or space can show. sRGB is the common screen gamut; Display P3 is wider. A color outside a gamut cannot be shown accurately there and must be mapped inward.Full glossary entry →Displays accurately on every screen and translates well to print.
Temperature
Undertone
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neutral, leaning cool
subtle blue undertone in this near-neutral
Nearest standard colors
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →- CSS: darkslategray #2F4F4F · ΔE 10.7
- RAL 7016: Anthracite grey #373F43 · ΔE 2.4 · approximate
RAL values are widely published approximations of the physical standard. For Pantone-adjacent workflows, match by eye against a physical fan deck. Pantone's values are proprietary and device-dependent, so we don't print lookups.
Where Arsenic works
- Web & UI: Use it directly for text on light surfaces; it clears AA contrast without adjustment.
- Interiors: Use it where you want the eye to land: a front door, built-ins, or one bold wall.
- Fashion: Works as a base layer or outerwear tone that lets brighter pieces do the talking.
- Branding: The safest brand-primary family there is; differentiate with an unexpected accent.
- Web & UI: Use it decoratively for dividers, chart series, and illustration accents, and let neutrals carry the type.
- Fashion: One garment in this color carries an outfit; two starts to compete.
Copy as: every ecosystem
Variations
Tints, shades, and tones of Arsenic
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →Tints (lighter)
Shades (darker)
Harmonies
Color harmonies
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →Palettes built from Arsenic by rotating its hue in OKLCH space. Click any swatch to copy its hex code.
Complementary
Analogous
Triadic
Split-complementary
Tetradic
Monochromatic
Accessibility
Contrast & accessibility
Aa on white
contrast 9.93:1
AA pass AAA pass AA large pass
Aa on black
contrast 2.11:1
AA fail AAA fail AA large fail
Best text color on a Arsenic background: #ffffff
Palettes
Palettes featuring Arsenic
Arsenic with its complement
Soft neighbors of Arsenic
Arsenic triad
Explore
Similar colors
- Lights Out #3D474B · ΔE 2.3
- Stargazing #414549 · ΔE 2.6
- Dead Forest #434B4F · ΔE 2.9
- Abyssal #404C57 · ΔE 3.3
- Tuna #46494E · ΔE 3.6
- Witchcraft #474C50 · ΔE 3.6
Looking for maximum contrast instead? The complement of Arsenic is closest to Batch Brew .
FAQ
Arsenic FAQs
What color is Arsenic?
Arsenic is a dark blue with the hex code #3B444B. In HSL terms it has a hue of 206°, 12% saturation, and 26% lightness.
What is the hex code for Arsenic?
The hex code for Arsenic is #3B444B. In RGB it's rgb(59, 68, 75), and in CMYK it's cmyk(21%, 9%, 0%, 71%).
What colors go well with Arsenic?
Arsenic pairs naturally with brown tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.
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