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Indomitable Chiton Crimson

#a5221a
Notes

Indomitable Chiton Crimson (#A5221A) 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 (3°, 73%, 37%) 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
#a5221a
RGB
rgb(165, 34, 26)
HSL
hsl(3, 73%, 37%)
HWB
hwb(3 10% 35%)
OKLCH
oklch(47.2% 0.168 28.9)
P3
color(display-p3 0.5946 0.1827 0.1381)
HSV
hsv(3, 84%, 65%)
LAB
lab(36.41% 51.78 38.48)
LCH
lch(36.41% 64.51 36.62)
CMYK
cmyk(0%, 79%, 84%, 35%)

Etymology

Indomitable
adjective

Latin indomitābilis, unconquerable — derived from domāre (to tame). As a color modifier, indomitable implies a saturated-and-unconquerable-and-fierce quality where the hue resists any attempt to subdue or modulate its presence. Sits at the bold-and-resilient end of the grid, parallel to unyielding and adamant.

Chiton
modifier

Greek χιτών, Hellenic-tunic. As a color modifier, chiton implies a Hellenic-tunic-and-pinned-and-pleated quality, the visual register of Hellenic-Doric-and-Ionic-chiton hand-Hellenic-tunic-and-pinned-and-pleated Hellenic-Doric-and-Ionic-chiton-and-Phidias-Parthenon chiton-and-Hellenic-tunic surfaces under Hellenic-Doric-and-Ionic-chiton-and-Phidias-Parthenon Athenian-Acropolis-and-Hellenic-court Hellenic-tunic-light. Sits at the modifier-and-textile end of the grid, parallel to peplos and tunic 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.

#a5221a
Original
#4c4317
Protanopia
#6c6012
Deuteranopia
#b60022
Tritanopia
#3d3d3d
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
7.39:1
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
2.84:1

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
##A5221A
Display P3
Display P3
color(display-p3 0.5946 0.1827 0.1381)
P3 has subtle headroomOKLCH chroma 0.168

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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