#181C38#181C38

#181C38 is a very dark, muted blue. Relative luminance 0.013; OKLCH L 23.9% C 0.054 H 275.4°. Best body text is #FFFFFF at 16.64:1 contrast (WCAG AA passes).

Color values

HEX	#181C38
RGB	rgb(24, 28, 56)
HSL	hsl(233, 40%, 16%)
HSV	hsv(233, 57%, 22%)
CMYK	cmyk(57.1%, 50%, 0%, 78%)
CIE-LAB	lab(11.35, 7.70, -18.86)
CIE-LCH	lch(11.35, 20.37, 292.21°)
OKLab	oklab(23.86% 0.0051 -0.0534)
OKLCH	oklch(23.86% 0.054 275.4)
XYZ	xyz(1.5055, 1.3101, 3.9142)
Luminance	0.0131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C38 #383418

analogous

#182C38 #181C38 #241838

triadic

#181C38 #38181C #1C3818

tetradic

#181C38 #38182C #383418 #183824

square

#181C38 #38182C #383418 #183824

split-complementary

#181C38 #382418 #2C3818

monochromatic

#090B15 #090B15 #181C38 #2A3163 #3D478E

Accessibility & contrast

On white

16.64

#181C38 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#181C38 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C38

16.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C38	#FFFFFF	#000000	##FFFFFF
##181C38	1.00	16.64	1.26	16.64
#FFFFFF	16.64	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#112039

Deuteranopia (green-blind)

#0E1D37

Tritanopia (blue-blind)

#0B2227

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181c38;
/* rgb */ color: rgb(24, 28, 56);
/* oklch */ color: oklch(23.9% 0.054 275.4);

Tailwind

colors: {
  custom: {
    50: '#57576f',
    500: '#181c38',
    950: '#000000',
  },
}

SCSS

$custom: #181c38;
$custom-light: #57576f;
$custom-dark: #000000;

JSON

{
  "hex": "#181c38",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 56
  },
  "hsl": {
    "h": 232.5,
    "s": 40,
    "l": 15.686
  },
  "oklch": {
    "l": 0.23864,
    "c": 0.05368,
    "h": 275.4
  },
  "luminance": 0.0131
}

Semantic roles & 50–950 ramp

primary

#181C38

secondary

#6E683E

accent

#C158D0

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #181C38

Body copy rendered with the generated semantic roles for this colour.

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