#181D57#181D57

#181D57 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.8% C 0.103 H 273.4°. Best body text is #FFFFFF at 15.53:1 contrast (WCAG AA passes).

Color values

HEX	#181D57
RGB	rgb(24, 29, 87)
HSL	hsl(235, 57%, 22%)
HSV	hsv(235, 72%, 34%)
CMYK	cmyk(72.4%, 66.7%, 0%, 65.9%)
CIE-LAB	lab(14.18, 19.33, -35.80)
CIE-LCH	lch(14.18, 40.68, 298.36°)
OKLab	oklab(26.79% 0.0061 -0.1032)
OKLCH	oklch(26.79% 0.103 273.4)
XYZ	xyz(2.5358, 1.7608, 9.2212)
Luminance	0.0176 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D57 #575218

analogous

#183D57 #181D57 #331857

triadic

#181D57 #57181D #1D5718

tetradic

#181D57 #57183D #575218 #185733

square

#181D57 #57183D #575218 #185733

split-complementary

#181D57 #573318 #3D5718

monochromatic

#070818 #0B0D27 #181D57 #252D87 #323DB7

Accessibility & contrast

On white

15.53

#181D57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#181D57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D57

15.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D57	#FFFFFF	#000000	##FFFFFF
##181D57	1.00	15.53	1.35	15.53
#FFFFFF	15.53	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002759

Deuteranopia (green-blind)

#002156

Tritanopia (blue-blind)

#002C36

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181d57;
/* rgb */ color: rgb(24, 29, 87);
/* oklch */ color: oklch(26.8% 0.103 273.4);

Tailwind

colors: {
  custom: {
    50: '#5e5987',
    500: '#181d57',
    950: '#000000',
  },
}

SCSS

$custom: #181d57;
$custom-light: #5e5987;
$custom-dark: #000000;

JSON

{
  "hex": "#181d57",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 87
  },
  "hsl": {
    "h": 235.238,
    "s": 56.757,
    "l": 21.765
  },
  "oklch": {
    "l": 0.26789,
    "c": 0.10339,
    "h": 273.4
  },
  "luminance": 0.01761
}

Semantic roles & 50–950 ramp

primary

#181D57

secondary

#8E873D

accent

#D448E0

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181D57

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

Preview Lab → · Contrast checker → · Palette generator →