colors
Back to gallery

Composed Mast Crimson

#b51b26
Notes

Composed Mast Crimson (#B51B26) 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 (356°, 74%, 41%) 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
#b51b26
RGB
rgb(181, 27, 38)
HSL
hsl(356, 74%, 41%)
HWB
hwb(356 11% 29%)
OKLCH
oklch(49.8% 0.186 24.6)
HSV
hsv(356, 85%, 71%)
LAB
lab(39.16% 58.65 35.61)
LCH
lch(39.16% 68.62 31.26)
CMYK
cmyk(0%, 85%, 79%, 29%)

Etymology

Composed
adjective

The past participle of compose, to arrange together — used as a color modifier for hues that read as deliberate and balanced. Composed black, composed gray: the saturation is moderate, the hue is calmly positioned without aggression. Sits at the bold-and-quiet edge of the grid near settled and resolute.

Mast
modifier

Old English mæst, long-pole. As a color modifier, mast implies a tall-pole-with-sails quality, the visual register of Tall-Ship-and-Royal-Navy-Mast hand-rigged tall-mast-with-sail-and-yard tall-ship-and-frigate maritime-architecture surfaces under tall-ship-mast-and-yard maritime-overhead light. Sits at the modifier-and-nautical end of the grid, parallel to spar and boom 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.

#b51b26
Original
#4f4725
Protanopia
#74681f
Deuteranopia
#c80022
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).
AAon White
6.67:1
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
3.15:1

Related Colors

Canvas