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Lush Lough Midnight

#181a68
Notes

Lush Lough Midnight (#181A68) 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 (239°, 63%, 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
#181a68
RGB
rgb(24, 26, 104)
HSL
hsl(239, 63%, 25%)
HWB
hwb(239 9% 59%)
OKLCH
oklch(28.0% 0.132 272.8)
P3
color(display-p3 0.0956 0.1017 0.3914)
HSV
hsv(239, 77%, 41%)
LAB
lab(15.13% 28.02 -45.56)
LCH
lch(15.13% 53.48 301.59)
CMYK
cmyk(77%, 75%, 0%, 59%)

Etymology

Lush
adjective

Middle English lush, possibly from lascious, lascivious — a word that drifted from sensual ripeness toward visual abundance. Used as a color word since the eighteenth century for the saturated greens of well-watered foliage and the deep saturated jewel tones of velvet upholstery. Used across the deep and bold buckets where the hue is simultaneously dark and vivid.

Lough
modifier

Irish-and-Scottish loch via Old Irish loch, lake / sea-inlet. As a color modifier, lough implies a still-mountain-water quality, the visual register of Connemara-and-Lough-Erne Irish-Highland glacial-cirque-and-river-mouth still-and-mirror-smooth fresh-water surfaces under Western-Irish overcast light. Sits at the modifier-and-place end of the grid, parallel to mere and pond 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.

#181a68
Original
#002a6a
Protanopia
#002267
Deuteranopia
#00303f
Tritanopia
#1f1f1f
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
15.15:1
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
##181A68
Display P3
Display P3
color(display-p3 0.0956 0.1017 0.3914)
P3 has subtle headroomOKLCH chroma 0.132

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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