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Adamant Athens Crimson

#ab1b1a
Notes

Adamant Athens Crimson (#AB1B1A) is a true red with a warm character. It leans warm, pulling light toward red, orange, and yellow. Naturally inviting, it suits editorial and hospitality contexts. Its HSL profile (0°, 74%, 39%) 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
#ab1b1a
RGB
rgb(171, 27, 26)
HSL
hsl(0, 74%, 39%)
HWB
hwb(0 10% 33%)
OKLCH
oklch(47.8% 0.178 27.6)
P3
color(display-p3 0.6155 0.1685 0.1389)
HSV
hsv(0, 85%, 67%)
LAB
lab(36.97% 55.47 39.45)
LCH
lch(36.97% 68.07 35.42)
CMYK
cmyk(0%, 84%, 85%, 33%)

Etymology

Adamant
adjective

Greek adámas, unconquerable — derived from a- (not) plus damnan (to subdue). As a color modifier, adamant implies a saturated-and-rock-hard quality where the hue maintains diamond-hard pigmentation. Sits at the bold-and-resilient end of the grid, parallel to indomitable and ironclad in usage.

Athens
modifier

Greek Ἀθῆναι, Athens. As a color modifier, athens implies an Acropolis-and-philosophical-city-state quality, the visual register of Athenian-Classical-City-State hand-built Acropolis-and-Parthenon-and-marble-temple-and-pottery Doric-and-Ionic-and-Corinthian surfaces under Athenian-Acropolis-and-Parthenon classical Aegean-marble-temple light. Sits at the modifier-and-cultural end of the grid, parallel to sparta and greek 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.

#ab1b1a
Original
#4c4317
Protanopia
#6e6211
Deuteranopia
#bd001e
Tritanopia
#3a3a3a
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
7.23:1
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
2.90:1

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
##AB1B1A
Display P3
Display P3
color(display-p3 0.6155 0.1685 0.1389)
P3 has subtle headroomOKLCH chroma 0.178

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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