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Rugged Pelt Ruby

#a21b1f
Notes

Rugged Pelt Ruby (#A21B1F) is a true red with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (358°, 71%, 37%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary cyan. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#a21b1f
RGB
rgb(162, 27, 31)
HSL
hsl(358, 71%, 37%)
HWB
hwb(358 11% 36%)
OKLCH
oklch(46.1% 0.170 25.9)
P3
color(display-p3 0.5830 0.1625 0.1493)
HSV
hsv(358, 83%, 64%)
LAB
lab(35.14% 53.00 34.27)
LCH
lch(35.14% 63.11 32.88)
CMYK
cmyk(0%, 83%, 81%, 36%)

Etymology

Rugged
adjective

Old Norse rugga, rough / coarse — adjectival suffix -ed. As a color modifier, rugged implies a saturated-and-rough-and-weathered quality, the deep-rich color of Scottish-Highlands-and-Norwegian-fjord outdoor-and-mountain landscape. Sits at the bold-and-weathered end of the grid, parallel to tough and sinewy in usage.

Pelt
modifier

Old French pellete, small-skin. As a color modifier, pelt implies a fur-with-skin-and-hide quality, the visual register of fur-trapper-and-Hudson-Bay-Pelt hand-trapped-and-skinned beaver-and-otter-and-mink hand-trapped-fur-pelt-and-hide surfaces under Hudson-Bay-and-fur-trapper hand-trapped pelt-and-hide trading-post light. Sits at the modifier-and-texture end of the grid, parallel to hide and fur in usage.

Ruby
noun

From the Latin ruber — simply, red. The gemstone is a chromium-tinged corundum, harder than anything in nature except diamond, and so saturated that a fine Burmese pigeon's blood ruby at auction outpaces a comparable diamond by weight. The color borrows the gem's confidence: a clear, glassy red without the brown of garnet or the blue of crimson.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

Click any swatch to explore

Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#a21b1f
Original
#47401d
Protanopia
#685d19
Deuteranopia
#b3001f
Tritanopia
#383838
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon White
7.74:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
2.71:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##A21B1F
Display P3
Display P3
color(display-p3 0.5830 0.1625 0.1493)
P3 has subtle headroomOKLCH chroma 0.170

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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