#181D59#181D59

#181D59 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.106 H 273.2°. Best body text is #FFFFFF at 15.45:1 contrast (WCAG AA passes).

Color values

HEX	#181D59
RGB	rgb(24, 29, 89)
HSL	hsl(235, 58%, 22%)
HSV	hsv(235, 73%, 35%)
CMYK	cmyk(73%, 67.4%, 0%, 65.1%)
CIE-LAB	lab(14.37, 20.12, -36.84)
CIE-LCH	lch(14.37, 41.98, 298.65°)
OKLab	oklab(26.99% 0.006 -0.1063)
OKLCH	oklch(26.99% 0.106 273.2)
XYZ	xyz(2.6186, 1.7939, 9.6575)
Luminance	0.0179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D59 #595418

analogous

#183D59 #181D59 #341859

triadic

#181D59 #59181D #1D5918

tetradic

#181D59 #59183D #595418 #185934

square

#181D59 #59183D #595418 #185934

split-complementary

#181D59 #593418 #3D5918

monochromatic

#060818 #0B0D29 #181D59 #252D89 #323CB9

Accessibility & contrast

On white

15.45

#181D59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181D59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D59

15.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D59	#FFFFFF	#000000	##FFFFFF
##181D59	1.00	15.45	1.36	15.45
#FFFFFF	15.45	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275B

Deuteranopia (green-blind)

#002158

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181d59;
/* rgb */ color: rgb(24, 29, 89);
/* oklch */ color: oklch(27.0% 0.106 273.2);

Tailwind

colors: {
  custom: {
    50: '#5f5988',
    500: '#181d59',
    950: '#000000',
  },
}

SCSS

$custom: #181d59;
$custom-light: #5f5988;
$custom-dark: #000000;

JSON

{
  "hex": "#181d59",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 89
  },
  "hsl": {
    "h": 235.385,
    "s": 57.522,
    "l": 22.157
  },
  "oklch": {
    "l": 0.26986,
    "c": 0.10643,
    "h": 273.2
  },
  "luminance": 0.01794
}

Semantic roles & 50–950 ramp

primary

#181D59

secondary

#90893D

accent

#D547E1

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #181D59

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

Preview Lab → · Contrast checker → · Palette generator →