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Rich Hematite

#ad220e
Notes

Rich Hematite (#AD220E) 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 (8°, 85%, 37%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. 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
#ad220e
RGB
rgb(173, 34, 14)
HSL
hsl(8, 85%, 37%)
HWB
hwb(8 5% 32%)
OKLCH
oklch(48.6% 0.177 31.3)
HSV
hsv(8, 92%, 68%)
LAB
lab(37.96% 53.97 45.99)
LCH
lch(37.96% 70.91 40.44)
CMYK
cmyk(0%, 80%, 92%, 32%)

Etymology

Rich
adjective

Old French riche, wealthy, abundant — applied to color since the medieval period for hues that read as plentiful in pigment. Rich red, rich brown: the implication is depth combined with saturation, a color that gives the eye more to absorb. Sits at the saturated mid-light corner of the engine's grid, slightly warmer than bold and deeper than vivid.

Hematite
noun

The most-mined iron oxide — ground into red ochre pigment since the Paleolithic and used as everything from cave-painting medium to the polishing agent for cathode-ray tube glass. The color refers to a polished hematite cabochon: a soft, slightly muted deep red-brown with the slight metallic luster of crystallized iron oxide. Drier than rust, warmer than burgundy.

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.

#ad220e
Original
#504607
Protanopia
#716400
Deuteranopia
#bf0020
Tritanopia
#3e3e3e
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).
AAon White
6.97:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.01:1

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Canvas