#181D63#181D63

#181D63 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.0% C 0.121 H 272.5°. Best body text is #FFFFFF at 15.06:1 contrast (WCAG AA passes).

Color values

HEX	#181D63
RGB	rgb(24, 29, 99)
HSL	hsl(236, 61%, 24%)
HSV	hsv(236, 76%, 39%)
CMYK	cmyk(75.8%, 70.7%, 0%, 61.2%)
CIE-LAB	lab(15.35, 24.07, -41.90)
CIE-LCH	lch(15.35, 48.32, 299.88°)
OKLab	oklab(28.01% 0.0052 -0.1211)
OKLCH	oklch(28.01% 0.121 272.5)
XYZ	xyz(3.0674, 1.9735, 12.0212)
Luminance	0.0197 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D63 #635E18

analogous

#184363 #181D63 #391863

triadic

#181D63 #63181D #1D6318

tetradic

#181D63 #631843 #635E18 #186339

square

#181D63 #631843 #635E18 #186339

split-complementary

#181D63 #633918 #436318

monochromatic

#060719 #0C0F32 #181D63 #242B94 #303AC6

Accessibility & contrast

On white

15.06

#181D63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#181D63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D63

15.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D63	#FFFFFF	#000000	##FFFFFF
##181D63	1.00	15.06	1.39	15.06
#FFFFFF	15.06	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A65

Deuteranopia (green-blind)

#002362

Tritanopia (blue-blind)

#00303D

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181d63;
/* rgb */ color: rgb(24, 29, 99);
/* oklch */ color: oklch(28.0% 0.121 272.5);

Tailwind

colors: {
  custom: {
    50: '#615990',
    500: '#181d63',
    950: '#000000',
  },
}

SCSS

$custom: #181d63;
$custom-light: #615990;
$custom-dark: #000000;

JSON

{
  "hex": "#181d63",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 99
  },
  "hsl": {
    "h": 236,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.28006,
    "c": 0.1212,
    "h": 272.5
  },
  "luminance": 0.01974
}

Semantic roles & 50–950 ramp

primary

#181D63

secondary

#99933E

accent

#D944E4

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030D

muted

#7A787D

Preview Lab

Preview with #181D63

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

Preview Lab → · Contrast checker → · Palette generator →