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Dark Modré

#234278
Notes

Dark Modré (#234278) is a deep azure 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 (218°, 55%, 30%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#234278
RGB
rgb(35, 66, 120)
HSL
hsl(218, 55%, 30%)
HWB
hwb(218 14% 53%)
OKLCH
oklch(38.5% 0.099 260.7)
P3
color(display-p3 0.1661 0.2558 0.4556)
HSV
hsv(218, 71%, 47%)
LAB
lab(28.40% 8.02 -34.27)
LCH
lch(28.40% 35.20 283.17)
CMYK
cmyk(71%, 45%, 0%, 53%)

Etymology

Dark
adjective

Old English deorc, dark, gloomy — cognate with the German dunkel and the Latin terra, earth, both pointing to a base meaning of covered or obscured. As a color modifier, dark sits on the lightness axis only: it says nothing about hue or saturation, only that the value is low. Used across every adjective bucket the engine routes to when L < 0.40.

Modré
noun

The Czech word for blue — used for the saturated deep blue of Czech traditional Modrotisk (blue-print) folk-textile resist-dyeing. Modré covers the entire blue spectrum in Czech color vocabulary. The color refers to a freshly Modrotisk-printed cotton: a saturated, slightly cool deep blue with the matte finish of plant-dyed-resist-printed cotton.

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.

#234278
Original
#28477a
Protanopia
#1a3f77
Deuteranopia
#004e57
Tritanopia
#3f3f3f
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
9.90:1
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
2.12:1

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
##234278
Display P3
Display P3
color(display-p3 0.1661 0.2558 0.4556)
P3 has subtle headroomOKLCH chroma 0.099

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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