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Crisp Umbra

#180913
Notes

Crisp Umbra (#180913) is a deep magenta with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (320°, 45%, 6%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. For a confident two-color system, pair it with its complementary green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#180913
RGB
rgb(24, 9, 19)
HSL
hsl(320, 45%, 6%)
HWB
hwb(320 4% 91%)
OKLCH
oklch(16.8% 0.032 340.8)
P3
color(display-p3 0.0861 0.0380 0.0726)
HSV
hsv(320, 63%, 9%)
LAB
lab(3.94% 7.25 -2.77)
LCH
lch(3.94% 7.76 339.08)
CMYK
cmyk(0%, 63%, 21%, 91%)

Etymology

Crisp
adjective

Latin crispus, curled — drifted in English from the curled hair sense to fresh and clean. As a color modifier, crisp implies saturation combined with optical clarity, with no haze or film between the eye and the surface. Used across the bright and crisp buckets where the hue is fresh-looking. Slightly less assertive than vivid.

Umbra
noun

Latin umbra, shadow — adopted into astronomy as the technical term for the deep-shadow inner cone of an eclipse shadow, where the occulting body completely blocks the light source. Umbra color refers to a total solar eclipse ground-level observer's path of totality darkness: a saturated, slightly cool deep black with the optical complexity of total-solar-eclipse atmospheric scattering against a shadow-cone-occluded sun-disk.

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.

#180913
Original
#0a0c13
Protanopia
#0e0f13
Deuteranopia
#1a090d
Tritanopia
#0d0d0d
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
19.31:1
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
1.09:1

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
##180913
Display P3
Display P3
color(display-p3 0.0861 0.0380 0.0726)
Inside sRGBOKLCH chroma 0.032

This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.

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