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Buried Swirl Midnight

#231866
Notes

Buried Swirl Midnight (#231866) is a deep blue 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 (248°, 62%, 25%) 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 yellow. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#231866
RGB
rgb(35, 24, 102)
HSL
hsl(248, 62%, 25%)
HWB
hwb(248 9% 60%)
OKLCH
oklch(28.3% 0.129 280.7)
P3
color(display-p3 0.1306 0.0958 0.3840)
HSV
hsv(248, 76%, 40%)
LAB
lab(15.33% 29.99 -43.88)
LCH
lch(15.33% 53.15 304.35)
CMYK
cmyk(66%, 76%, 0%, 60%)

Etymology

Buried
adjective

Old English byrgan, to inter — past-participle of bury. As a color modifier, buried implies the deep-shrouded darkness of a sealed-and-covered hue, where surface qualities are obscured by intervening material. Sits at the deep-and-obscured end of the grid, parallel to cloaked and entombed.

Swirl
modifier

Middle English swirlen, to-whirl-in-eddies. As a color modifier, swirl implies a curling-and-eddying-and-spiraling quality, the visual register of Van-Gogh-Starry-Night-and-Hokusai-Wave-swirl hand-curling-and-eddying-and-spiraling Van-Gogh-Starry-Night-and-Hokusai-Wave-and-Art-Nouveau swirled-and-curling-and-eddying-and-spiraling surfaces under Van-Gogh-Starry-Night-and-Hokusai-Wave-and-Art-Nouveau brush-stroke-and-cresting-wave-and-vine-tendril nocturne-light. Sits at the modifier-and-mood end of the grid, parallel to eddy and stir in usage.

Midnight
noun

The color of the sky at midnight on a clear, moonless night, far from city lights — almost black, but with a slight blue cast where star-scattered light reaches the eye. The color refers to that exact moment: a very deep, slightly violet-shifted near-black blue with the optical depth of a sky stripped of every direct light source. Deeper than navy, warmer than ink, with the temporal weight of a name that is a precise hour as well as a color.

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.

#231866
Original
#002968
Protanopia
#002365
Deuteranopia
#002e3d
Tritanopia
#202020
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
15.06:1
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
1.39:1

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
##231866
Display P3
Display P3
color(display-p3 0.1306 0.0958 0.3840)
P3 has subtle headroomOKLCH chroma 0.129

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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