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Rich Hermes Crimson

#a10503
Notes

Rich Hermes Crimson (#A10503) is a deep 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 (1°, 96%, 32%) places it in the highly saturated band at a dark 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
#a10503
RGB
rgb(161, 5, 3)
HSL
hsl(1, 96%, 32%)
HWB
hwb(1 1% 37%)
OKLCH
oklch(44.7% 0.181 29.2)
HSV
hsv(1, 98%, 63%)
LAB
lab(33.34% 56.15 46.13)
LCH
lch(33.34% 72.67 39.40)
CMYK
cmyk(0%, 97%, 98%, 37%)

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.

Hermes
modifier

Greek Ἑρμῆς, messenger-of-the-Olympian-gods. As a color modifier, hermes implies a winged-sandal-and-caduceus-and-messenger quality, the visual register of Praxiteles-Hermes-and-Olympia-marble hand-winged-sandal-and-caduceus-and-messenger Praxiteles-Hermes-and-Olympia-marble-and-Hellenistic-bronze hermes-and-winged-sandal-and-caduceus surfaces under Praxiteles-Hermes-and-Olympia-marble-and-Hellenistic-bronze Olympian-pantheon-and-marketplace Mediterranean-marble-light. Sits at the modifier-and-myth end of the grid, parallel to zeus and atlas in usage.

Crimson
noun

From the Old Spanish cremesin, itself from the Arabic qirmiz — the kermes scale insect, dried and ground into a brilliant carmine dye prized in the medieval Mediterranean. For centuries the most expensive red on a draper's shelf, reserved for cardinals, kings, and the cloth that gave English the word crimson. Cooler than scarlet, deeper than rose; the color of pomegranate seeds and a serious occasion.

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.

#a10503
Original
#433a00
Protanopia
#665900
Deuteranopia
#b2000a
Tritanopia
#262626
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
8.27:1
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
2.54:1

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