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Tough Glint Crimson

#ad0d1d
Notes

Tough Glint Crimson (#AD0D1D) 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 (354°, 86%, 36%) 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
#ad0d1d
RGB
rgb(173, 13, 29)
HSL
hsl(354, 86%, 36%)
HWB
hwb(354 5% 32%)
OKLCH
oklch(47.5% 0.187 25.2)
HSV
hsv(354, 92%, 68%)
LAB
lab(36.49% 58.76 37.52)
LCH
lch(36.49% 69.72 32.56)
CMYK
cmyk(0%, 92%, 83%, 32%)

Etymology

Tough
adjective

Old English tōh, firm / tenacious — sharing root with German zäh. As a color modifier, tough implies a saturated-and-resilient quality where the hue resists fading-and-modulation through its strong pigmentation. Sits at the bold-and-resilient end of the grid, parallel to rugged and hardy in usage.

Glint
modifier

Middle English glent, to-shine-or-glance. As a color modifier, glint implies a brief-and-glancing-and-pinpoint-shine quality, the visual register of Scottish-burn-and-anvil-spark-glint hand-brief-and-glancing-and-pinpoint-shine Scottish-burn-and-anvil-spark-and-flint-strike glinted-and-brief-and-glancing surfaces under Scottish-burn-and-anvil-spark-and-flint-strike sun-on-water-and-forge-spark fleeting-glance-light. Sits at the modifier-and-mood end of the grid, parallel to gleam and spark 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.

#ad0d1d
Original
#48411b
Protanopia
#6d6114
Deuteranopia
#bf0017
Tritanopia
#303030
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
7.36:1
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
2.85:1

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