#181E59#181E59

#181E59 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.2% C 0.105 H 272.8°. Best body text is #FFFFFF at 15.34:1 contrast (WCAG AA passes).

Color values

HEX	#181E59
RGB	rgb(24, 30, 89)
HSL	hsl(234, 58%, 22%)
HSV	hsv(234, 73%, 35%)
CMYK	cmyk(73%, 66.3%, 0%, 65.1%)
CIE-LAB	lab(14.65, 19.40, -36.38)
CIE-LCH	lch(14.65, 41.23, 298.07°)
OKLab	oklab(27.19% 0.0051 -0.1049)
OKLCH	oklch(27.19% 0.105 272.8)
XYZ	xyz(2.6435, 1.8438, 9.6658)
Luminance	0.0184 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181E59 #595318

analogous

#183E59 #181E59 #331859

triadic

#181E59 #59181E #1E5918

tetradic

#181E59 #59183E #595318 #185933

square

#181E59 #59183E #595318 #185933

split-complementary

#181E59 #593318 #3E5918

monochromatic

#060818 #0B0E29 #181E59 #252E89 #323EB9

Accessibility & contrast

On white

15.34

#181E59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#181E59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181E59

15.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181E59	#FFFFFF	#000000	##FFFFFF
##181E59	1.00	15.34	1.37	15.34
#FFFFFF	15.34	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285B

Deuteranopia (green-blind)

#002258

Tritanopia (blue-blind)

#002D38

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181e59;
/* rgb */ color: rgb(24, 30, 89);
/* oklch */ color: oklch(27.2% 0.105 272.8);

Tailwind

colors: {
  custom: {
    50: '#5f5988',
    500: '#181e59',
    950: '#000000',
  },
}

SCSS

$custom: #181e59;
$custom-light: #5f5988;
$custom-dark: #000000;

JSON

{
  "hex": "#181e59",
  "rgb": {
    "r": 24,
    "g": 30,
    "b": 89
  },
  "hsl": {
    "h": 234.462,
    "s": 57.522,
    "l": 22.157
  },
  "oklch": {
    "l": 0.27191,
    "c": 0.10504,
    "h": 272.8
  },
  "luminance": 0.01844
}

Semantic roles & 50–950 ramp

primary

#181E59

secondary

#90883D

accent

#D347E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181E59

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

Preview Lab → · Contrast checker → · Palette generator →