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Sinewy Isis Crimson

#b61f25
Notes

Sinewy Isis Crimson (#B61F25) 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 (358°, 71%, 42%) 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
#b61f25
RGB
rgb(182, 31, 37)
HSL
hsl(358, 71%, 42%)
HWB
hwb(358 12% 29%)
OKLCH
oklch(50.3% 0.185 25.6)
P3
color(display-p3 0.6555 0.1855 0.1749)
HSV
hsv(358, 83%, 71%)
LAB
lab(39.68% 57.96 36.79)
LCH
lch(39.68% 68.65 32.41)
CMYK
cmyk(0%, 83%, 80%, 29%)

Etymology

Sinewy
adjective

Old English sinu, sinew — adjectival suffix -y. As a color modifier, sinewy implies a saturated-and-muscular-and-firm quality where the hue carries the lean-and-strong visual presence of a Roman-statue athletic figure. Sits at the bold-and-firm end of the grid, parallel to stalwart and rugged in usage.

Isis
modifier

Egyptian Aset, throne-and-mother-goddess. As a color modifier, isis implies a winged-and-throne-and-mother-goddess quality, the visual register of Egyptian-Isis-and-Philae-temple hand-winged-and-throne-and-mother-goddess Egyptian-Isis-and-Philae-temple-and-Osirian-myth isis-and-winged-and-throne-and-mother-goddess surfaces under Egyptian-Isis-and-Philae-temple-and-Osirian-myth Nile-and-Philae-Aswan-temple winged-throne-light. Sits at the modifier-and-myth end of the grid, parallel to horus and thoth 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.

#b61f25
Original
#514923
Protanopia
#75691e
Deuteranopia
#c90024
Tritanopia
#404040
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
6.54:1
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
3.21:1

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
##B61F25
Display P3
Display P3
color(display-p3 0.6555 0.1855 0.1749)
P3 has visible headroomOKLCH chroma 0.185

This color is chromatic enough that authoring it as P3 native (instead of clamping to sRGB) gives a perceptibly more saturated render on wide-gamut displays — modern Macs, iPhones, iPads, and most recent OLED laptops.

Related Colors

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