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Bold Senex Crimson

#d7183d
Notes

Bold Senex Crimson (#D7183D) is a true red with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (348°, 80%, 47%) 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 teal. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#d7183d
RGB
rgb(215, 24, 61)
HSL
hsl(348, 80%, 47%)
HWB
hwb(348 9% 16%)
OKLCH
oklch(56.4% 0.216 19.7)
HSV
hsv(348, 89%, 84%)
LAB
lab(46.23% 69.12 31.80)
LCH
lch(46.23% 76.08 24.71)
CMYK
cmyk(0%, 89%, 72%, 16%)

Etymology

Bold
adjective

Old English beald, brave, courageous — a quality word that crossed over to color in the late seventeenth century. Bold describes a color that asserts itself: high saturation combined with mid lightness, where the hue presents itself without compromise. Sits at the center of the bold-bucket grid, near strong and rich. Closer to a presence word than a pigment word.

Senex
modifier

Latin senex, old-man-or-elder. As a color modifier, senex implies a Latin-elder-and-Roman-Senate-elder quality, the visual register of Cicero-Cato-the-Elder-senex hand-Latin-elder-and-Roman-Senate-elder Cicero-Cato-the-Elder-senex-and-De-Senectute senex-and-Latin-elder-and-Roman-Senate-elder surfaces under Cicero-Cato-the-Elder-senex-and-De-Senectute Roman-Senate-and-villa-retreat venerable-elder-light. Sits at the modifier-and-Latin end of the grid, parallel to pater and virtus 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

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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.

#d7183d
Original
#5b543d
Protanopia
#887b37
Deuteranopia
#ed002b
Tritanopia
#434343
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
5.14:1
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
4.09:1

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