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Sturdy Cowl Crimson

#aa271d
Notes

Sturdy Cowl Crimson (#AA271D) 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 (4°, 71%, 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
#aa271d
RGB
rgb(170, 39, 29)
HSL
hsl(4, 71%, 39%)
HWB
hwb(4 11% 33%)
OKLCH
oklch(48.5% 0.169 29.2)
P3
color(display-p3 0.6132 0.1995 0.1496)
HSV
hsv(4, 83%, 67%)
LAB
lab(38.00% 51.83 38.74)
LCH
lch(38.00% 64.71 36.78)
CMYK
cmyk(0%, 77%, 83%, 33%)

Etymology

Sturdy
adjective

Old French estourdi, stunned, reckless — drifted in English to mean robust, well-built. Used as a color modifier since the seventeenth century for hues that read as durable and unfussy — the working browns of saddle leather, the working greens of pasture wool. Sits in the bold-and-warm corner alongside robust and solid.

Cowl
modifier

Latin cuculla, monk's-hood-or-hood-of-habit. As a color modifier, cowl implies a monk's-hood-and-deeply-folded-hood quality, the visual register of Benedictine-and-Cistercian-monk's-cowl hand-monk's-hood-and-deeply-folded-hood Benedictine-and-Cistercian-monk's-cowl-and-Cluny-Abbey cowl-and-monk's-hood surfaces under Benedictine-and-Cistercian-monk's-cowl-and-Cluny-Abbey Cluny-and-Cîteaux-Abbey monastic-cloister-light. Sits at the modifier-and-textile end of the grid, parallel to cloak and frock 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.

#aa271d
Original
#50471a
Protanopia
#706416
Deuteranopia
#bc0026
Tritanopia
#424242
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
6.96:1
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
3.02:1

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
##AA271D
Display P3
Display P3
color(display-p3 0.6132 0.1995 0.1496)
P3 has subtle headroomOKLCH chroma 0.169

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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