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Robust Lyra Crimson

#b10321
Notes

Robust Lyra Crimson (#B10321) 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 (350°, 97%, 35%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary teal. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#b10321
RGB
rgb(177, 3, 33)
HSL
hsl(350, 97%, 35%)
HWB
hwb(350 1% 31%)
OKLCH
oklch(48.1% 0.193 23.6)
P3
color(display-p3 0.6357 0.1307 0.1577)
HSV
hsv(350, 98%, 69%)
LAB
lab(36.98% 61.11 36.00)
LCH
lch(36.98% 70.93 30.50)
CMYK
cmyk(0%, 98%, 81%, 31%)

Etymology

Robust
adjective

From the Latin robustus, of oak — implying strength combined with substance. As a color modifier, robust describes saturation combined with body: a robust burgundy, a robust olive. Sits in the bold-and-warm corner alongside strong and solid, with the slightly textural implication of a color that has substance behind the pigment.

Lyra
modifier

Greek λύρα, lyre-of-Orpheus. As a color modifier, lyra implies a small-summer-constellation-and-Orpheus-lyre quality, the visual register of summer-Lyra-and-Orpheus-lyre hand-small-summer-constellation-and-Orpheus-lyre summer-Lyra-and-Orpheus-lyre-and-Bortle-1-sky lyra-and-small-summer-constellation-and-Orpheus-lyre surfaces under summer-Lyra-and-Orpheus-lyre-and-Bortle-1-sky July-and-August-summer-zenith ring-nebula-and-stellar-light. Sits at the modifier-and-cosmic end of the grid, parallel to vega and cygnus 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.

#b10321
Original
#484120
Protanopia
#6f6319
Deuteranopia
#c40015
Tritanopia
#2a2a2a
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
7.23:1
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
2.90:1

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
##B10321
Display P3
Display P3
color(display-p3 0.6357 0.1307 0.1577)
P3 has visible headroomOKLCH chroma 0.193

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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