#181E51#181E51

#181E51 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.093 H 273.2°. Best body text is #FFFFFF at 15.63:1 contrast (WCAG AA passes).

Color values

HEX	#181E51
RGB	rgb(24, 30, 81)
HSL	hsl(234, 54%, 21%)
HSV	hsv(234, 70%, 32%)
CMYK	cmyk(70.4%, 63%, 0%, 68.2%)
CIE-LAB	lab(13.92, 16.18, -32.15)
CIE-LCH	lch(13.92, 35.99, 296.71°)
OKLab	oklab(26.43% 0.0052 -0.0925)
OKLCH	oklch(26.43% 0.093 273.2)
XYZ	xyz(2.3257, 1.7166, 7.9918)
Luminance	0.0172 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.14

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181E51 #514B18

analogous

#183A51 #181E51 #2E1851

triadic

#181E51 #51181E #1E5118

tetradic

#181E51 #51183A #514B18 #18512E

square

#181E51 #51183A #514B18 #18512E

split-complementary

#181E51 #512E18 #3A5118

monochromatic

#070918 #0A0D22 #181E51 #262F80 #3441AF

Accessibility & contrast

On white

15.63

#181E51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#181E51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181E51

15.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181E51	#FFFFFF	#000000	##FFFFFF
##181E51	1.00	15.63	1.34	15.63
#FFFFFF	15.63	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002653

Deuteranopia (green-blind)

#002150

Tritanopia (blue-blind)

#002A34

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #181e51;
/* rgb */ color: rgb(24, 30, 81);
/* oklch */ color: oklch(26.4% 0.093 273.2);

Tailwind

colors: {
  custom: {
    50: '#5d5982',
    500: '#181e51',
    950: '#000000',
  },
}

SCSS

$custom: #181e51;
$custom-light: #5d5982;
$custom-dark: #000000;

JSON

{
  "hex": "#181e51",
  "rgb": {
    "r": 24,
    "g": 30,
    "b": 81
  },
  "hsl": {
    "h": 233.684,
    "s": 54.286,
    "l": 20.588
  },
  "oklch": {
    "l": 0.26431,
    "c": 0.09262,
    "h": 273.2
  },
  "luminance": 0.01717
}

Semantic roles & 50–950 ramp

primary

#181E51

secondary

#88803D

accent

#CE4ADE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030A

muted

#79787C

Preview Lab

Preview with #181E51

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

Preview Lab → · Contrast checker → · Palette generator →