#181B4D#181B4D

#181B4D is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.4% C 0.091 H 275.3°. Best body text is #FFFFFF at 16.12:1 contrast (WCAG AA passes).

Color values

HEX	#181B4D
RGB	rgb(24, 27, 77)
HSL	hsl(237, 52%, 20%)
HSV	hsv(237, 69%, 30%)
CMYK	cmyk(68.8%, 64.9%, 0%, 69.8%)
CIE-LAB	lab(12.69, 16.79, -31.41)
CIE-LCH	lch(12.69, 35.61, 298.13°)
OKLab	oklab(25.41% 0.0083 -0.0903)
OKLCH	oklch(25.41% 0.091 275.3)
XYZ	xyz(2.1077, 1.5137, 7.2008)
Luminance	0.0151 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B4D #4D4A18

analogous

#18354D #181B4D #30184D

triadic

#181B4D #4D181B #1B4D18

tetradic

#181B4D #4D1835 #4D4A18 #184D30

square

#181B4D #4D1835 #4D4A18 #184D30

split-complementary

#181B4D #4D3018 #354D18

monochromatic

#070817 #090B1E #181B4D #272B7C #353CAA

Accessibility & contrast

On white

16.12

#181B4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#181B4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B4D

16.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B4D	#FFFFFF	#000000	##FFFFFF
##181B4D	1.00	16.12	1.30	16.12
#FFFFFF	16.12	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234F

Deuteranopia (green-blind)

#001F4C

Tritanopia (blue-blind)

#002731

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181b4d;
/* rgb */ color: rgb(24, 27, 77);
/* oklch */ color: oklch(25.4% 0.091 275.3);

Tailwind

colors: {
  custom: {
    50: '#5c577f',
    500: '#181b4d',
    950: '#000000',
  },
}

SCSS

$custom: #181b4d;
$custom-light: #5c577f;
$custom-dark: #000000;

JSON

{
  "hex": "#181b4d",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 77
  },
  "hsl": {
    "h": 236.604,
    "s": 52.475,
    "l": 19.804
  },
  "oklch": {
    "l": 0.25407,
    "c": 0.09071,
    "h": 275.3
  },
  "luminance": 0.01514
}

Semantic roles & 50–950 ramp

primary

#181B4D

secondary

#84803D

accent

#D44CDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181B4D

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

Preview Lab → · Contrast checker → · Palette generator →