#181737#181737

#181737 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.6% C 0.061 H 281.8°. Best body text is #FFFFFF at 17.26:1 contrast (WCAG AA passes).

Color values

HEX	#181737
RGB	rgb(24, 23, 55)
HSL	hsl(242, 41%, 15%)
HSV	hsv(242, 58%, 22%)
CMYK	cmyk(56.4%, 58.2%, 0%, 78.4%)
CIE-LAB	lab(9.66, 11.14, -20.83)
CIE-LCH	lch(9.66, 23.62, 298.15°)
OKLab	oklab(22.56% 0.0124 -0.0593)
OKLCH	oklch(22.56% 0.061 281.8)
XYZ	xyz(1.3725, 1.0827, 3.7504)
Luminance	0.0108 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.66

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181737 #363717

analogous

#172637 #181737 #281737

triadic

#181737 #371817 #173718

tetradic

#181737 #371726 #363717 #173728

square

#181737 #371726 #363717 #173728

split-complementary

#181737 #372817 #263717

monochromatic

#090916 #090916 #181737 #2B2962 #3E3B8D

Accessibility & contrast

On white

17.26

#181737 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#181737 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181737

17.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181737	#FFFFFF	#000000	##FFFFFF
##181737	1.00	17.26	1.22	17.26
#FFFFFF	17.26	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#091C38

Deuteranopia (green-blind)

#071A36

Tritanopia (blue-blind)

#0D1E24

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #181737;
/* rgb */ color: rgb(24, 23, 55);
/* oklch */ color: oklch(22.6% 0.061 281.8);

Tailwind

colors: {
  custom: {
    50: '#57536e',
    500: '#181737',
    950: '#000000',
  },
}

SCSS

$custom: #181737;
$custom-light: #57536e;
$custom-dark: #000000;

JSON

{
  "hex": "#181737",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 55
  },
  "hsl": {
    "h": 241.875,
    "s": 41.026,
    "l": 15.294
  },
  "oklch": {
    "l": 0.22564,
    "c": 0.06054,
    "h": 281.8
  },
  "luminance": 0.01083
}

Semantic roles & 50–950 ramp

primary

#181737

secondary

#6C6D3D

accent

#D157CD

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #181737

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

Preview Lab → · Contrast checker → · Palette generator →