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Shielded Opus Crimson

#b22d27
Notes

Shielded Opus Crimson (#B22D27) 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 (3°, 64%, 43%) 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
#b22d27
RGB
rgb(178, 45, 39)
HSL
hsl(3, 64%, 43%)
HWB
hwb(3 15% 30%)
OKLCH
oklch(50.6% 0.171 27.7)
P3
color(display-p3 0.6428 0.2213 0.1827)
HSV
hsv(3, 78%, 70%)
LAB
lab(40.40% 52.65 36.15)
LCH
lch(40.40% 63.87 34.48)
CMYK
cmyk(0%, 75%, 78%, 30%)

Etymology

Shielded
adjective

Old English scild, shield — past-participle of shield, sharing root with German Schild. As a color modifier, shielded implies a saturated-and-protected-and-defensive quality, the deep-rich color of medieval-knight armorial-shield-and-coat-of-arms heraldic display. Sits at the bold-and-fortified end of the grid, parallel to armored and bastioned.

Opus
modifier

Latin opus, work-or-composition. As a color modifier, opus implies a Latin-work-and-Magnum-Opus-and-Opus-Dei quality, the visual register of Magnum-Opus-and-musical-opus-number hand-Latin-work-and-Magnum-Opus-and-Opus-Dei Magnum-Opus-and-musical-opus-number-and-medieval-cathedral-opus opus-and-Latin-work surfaces under Magnum-Opus-and-musical-opus-number-and-medieval-cathedral-opus monastic-scriptorium-and-medieval-cathedral-fabric craft-and-composition-light. Sits at the modifier-and-Latin end of the grid, parallel to magnus and ergo 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.

#b22d27
Original
#554d25
Protanopia
#766a21
Deuteranopia
#c4002d
Tritanopia
#494949
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
6.37:1
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
3.30:1

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
##B22D27
Display P3
Display P3
color(display-p3 0.6428 0.2213 0.1827)
P3 has subtle headroomOKLCH chroma 0.171

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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