Crucible
Also known as: Carbon Dating, Mostly Metal, Black Pool, Soot
A muted gray with a quiet and sophisticated character, Crucible works beautifully for minimal interfaces and architecture. Reach for a gray companion shade to give Crucible maximum contrast. It's dark enough to use for text on white backgrounds (6.94:1, passes WCAG AA).
Crucible color codes
- HEX
- #555B59
- RGB
- rgb(85, 91, 89)
- RGBA
- rgba(85, 91, 89, 1)
- HSL
- hsl(160, 3%, 35%)
- HSV
- hsv(160, 7%, 36%)
- CMYK
- cmyk(7%, 0%, 2%, 64%)
- LAB
- lab(38.1 -2.8 0.3)
- OKLCH
- oklch(46.5% 0.008 174.1)
Color intelligence
Displays accurately on every screen and translates well to print.
Temperature
neutral, leaning cool
subtle cyan undertone in this near-neutral
Nearest standard colors
- CSS: dimgray#696969 · ΔE 6.8
- RAL 7010 — Tarpaulin grey#575D57 · 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 Crucible 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 — 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: As a brand anchor it reads established and tactile; pair with a single vivid accent for energy.
- Web & UI: Use it decoratively — dividers, chart series, 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
Tints, shades, and tones of Crucible
Tints (lighter)
Shades (darker)
Color harmonies
Palettes built from Crucible by rotating its hue in OKLCH space. Click any swatch to copy its hex code.
Complementary
Analogous
Triadic
Split-complementary
Tetradic
Monochromatic
Contrast & accessibility
Aa — on white
contrast 6.94:1
AA passAAA failAA large pass
Aa — on black
contrast 3.03:1
AA failAAA failAA large pass
Best text color on a Crucible background: #ffffff
Palettes featuring Crucible
Crucible with its complement
Soft neighbors of Crucible
Crucible triad
Similar colors
- Yacht Club#566062 · ΔE 3.1
- Blindfolded#5A5E61 · ΔE 3.8
- Trout#4C5356 · ΔE 4.1
- Iron#5E5E5E · ΔE 4.2
- Stone Cold#555555 · ΔE 4.2
- Lava Rock#535E64 · ΔE 4.8
Looking for maximum contrast instead? The complement of Crucible is closest to Smokescreen.
Crucible FAQs
What color is Crucible?
Crucible is a dark gray with the hex code #555B59. In HSL terms it has a hue of 160°, 3% saturation, and 35% lightness.
What is the hex code for Crucible?
The hex code for Crucible is #555B59. In RGB it's rgb(85, 91, 89), and in CMYK it's cmyk(7%, 0%, 2%, 64%).
What colors go well with Crucible?
Crucible pairs naturally with gray tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.
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