#181751#181751

#181751 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 25.0% C 0.103 H 276.7°. Best body text is #FFFFFF at 16.40:1 contrast (WCAG AA passes).

Color values

HEX	#181751
RGB	rgb(24, 23, 81)
HSL	hsl(241, 56%, 20%)
HSV	hsv(241, 72%, 32%)
CMYK	cmyk(70.4%, 71.6%, 0%, 68.2%)
CIE-LAB	lab(11.96, 21.26, -35.34)
CIE-LCH	lch(11.96, 41.24, 301.03°)
OKLab	oklab(24.99% 0.012 -0.1019)
OKLCH	oklch(24.99% 0.103 276.7)
XYZ	xyz(2.1678, 1.4009, 7.9391)
Luminance	0.0140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.18

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181751 #505117

analogous

#173351 #181751 #351751

triadic

#181751 #511817 #175118

tetradic

#181751 #511733 #505117 #175135

square

#181751 #511733 #505117 #175135

split-complementary

#181751 #513517 #335117

monochromatic

#070718 #0A0921 #181751 #262581 #3432B0

Accessibility & contrast

On white

16.40

#181751 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#181751 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181751

16.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181751	#FFFFFF	#000000	##FFFFFF
##181751	1.00	16.40	1.28	16.40
#FFFFFF	16.40	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002253

Deuteranopia (green-blind)

#001D50

Tritanopia (blue-blind)

#002631

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181751;
/* rgb */ color: rgb(24, 23, 81);
/* oklch */ color: oklch(25.0% 0.103 276.7);

Tailwind

colors: {
  custom: {
    50: '#5d5482',
    500: '#181751',
    950: '#000000',
  },
}

SCSS

$custom: #181751;
$custom-light: #5d5482;
$custom-dark: #000000;

JSON

{
  "hex": "#181751",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 81
  },
  "hsl": {
    "h": 241.034,
    "s": 55.769,
    "l": 20.392
  },
  "oklch": {
    "l": 0.24988,
    "c": 0.10262,
    "h": 276.7
  },
  "luminance": 0.01401
}

Semantic roles & 50–950 ramp

primary

#181751

secondary

#87883C

accent

#DF49DC

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05020A

muted

#79787C

Preview Lab

Preview with #181751

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

Preview Lab → · Contrast checker → · Palette generator →