#181B4C#181B4C

#181B4C is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.3% C 0.089 H 275.4°. Best body text is #FFFFFF at 16.15:1 contrast (WCAG AA passes).

Color values

HEX	#181B4C
RGB	rgb(24, 27, 76)
HSL	hsl(237, 52%, 20%)
HSV	hsv(237, 68%, 30%)
CMYK	cmyk(68.4%, 64.5%, 0%, 70.2%)
CIE-LAB	lab(12.61, 16.39, -30.86)
CIE-LCH	lch(12.61, 34.94, 297.97°)
OKLab	oklab(25.31% 0.0083 -0.0887)
OKLCH	oklch(25.31% 0.089 275.4)
XYZ	xyz(2.0727, 1.4997, 7.0163)
Luminance	0.0150 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B4C #4C4918

analogous

#18354C #181B4C #2F184C

triadic

#181B4C #4C181B #1B4C18

tetradic

#181B4C #4C1835 #4C4918 #184C2F

square

#181B4C #4C1835 #4C4918 #184C2F

split-complementary

#181B4C #4C2F18 #354C18

monochromatic

#070817 #090A1D #181B4C #272C7B #353CA9

Accessibility & contrast

On white

16.15

#181B4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#181B4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B4C

16.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B4C	#FFFFFF	#000000	##FFFFFF
##181B4C	1.00	16.15	1.30	16.15
#FFFFFF	16.15	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234E

Deuteranopia (green-blind)

#001F4B

Tritanopia (blue-blind)

#002730

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181b4c;
/* rgb */ color: rgb(24, 27, 76);
/* oklch */ color: oklch(25.3% 0.089 275.4);

Tailwind

colors: {
  custom: {
    50: '#5c577e',
    500: '#181b4c',
    950: '#000000',
  },
}

SCSS

$custom: #181b4c;
$custom-light: #5c577e;
$custom-dark: #000000;

JSON

{
  "hex": "#181b4c",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 76
  },
  "hsl": {
    "h": 236.538,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.25314,
    "c": 0.08912,
    "h": 275.4
  },
  "luminance": 0.015
}

Semantic roles & 50–950 ramp

primary

#181B4C

secondary

#837F3D

accent

#D34CDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181B4C

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

Preview Lab → · Contrast checker → · Palette generator →