#181D4B#181D4B

#181D4B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.7% C 0.084 H 274.1°. Best body text is #FFFFFF at 15.96:1 contrast (WCAG AA passes).

Color values

HEX	#181D4B
RGB	rgb(24, 29, 75)
HSL	hsl(234, 52%, 19%)
HSV	hsv(234, 68%, 29%)
CMYK	cmyk(68%, 61.3%, 0%, 70.6%)
CIE-LAB	lab(13.11, 14.49, -29.35)
CIE-LCH	lch(13.11, 32.74, 296.28°)
OKLab	oklab(25.66% 0.0061 -0.0843)
OKLCH	oklch(25.66% 0.084 274.1)
XYZ	xyz(2.0856, 1.5808, 6.8505)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.65

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D4B #4B4618

analogous

#18374B #181D4B #2D184B

triadic

#181D4B #4B181D #1D4B18

tetradic

#181D4B #4B1837 #4B4618 #184B2D

square

#181D4B #4B1837 #4B4618 #184B2D

split-complementary

#181D4B #4B2D18 #374B18

monochromatic

#070917 #090B1D #181D4B #272F79 #3641A8

Accessibility & contrast

On white

15.96

#181D4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#181D4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D4B

15.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D4B	#FFFFFF	#000000	##FFFFFF
##181D4B	1.00	15.96	1.32	15.96
#FFFFFF	15.96	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00244D

Deuteranopia (green-blind)

#00204A

Tritanopia (blue-blind)

#002830

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181d4b;
/* rgb */ color: rgb(24, 29, 75);
/* oklch */ color: oklch(25.7% 0.084 274.1);

Tailwind

colors: {
  custom: {
    50: '#5b587e',
    500: '#181d4b',
    950: '#000000',
  },
}

SCSS

$custom: #181d4b;
$custom-light: #5b587e;
$custom-dark: #000000;

JSON

{
  "hex": "#181d4b",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 75
  },
  "hsl": {
    "h": 234.118,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.25663,
    "c": 0.08449,
    "h": 274.1
  },
  "luminance": 0.01581
}

Semantic roles & 50–950 ramp

primary

#181D4B

secondary

#827B3D

accent

#CD4DDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181D4B

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

Preview Lab → · Contrast checker → · Palette generator →