#181559#181559

#181559 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.5% C 0.117 H 276.1°. Best body text is #FFFFFF at 16.27:1 contrast (WCAG AA passes).

Color values

HEX	#181559
RGB	rgb(24, 21, 89)
HSL	hsl(243, 62%, 22%)
HSV	hsv(243, 76%, 35%)
CMYK	cmyk(73%, 76.4%, 0%, 65.1%)
CIE-LAB	lab(12.30, 25.68, -40.23)
CIE-LCH	lch(12.30, 47.73, 302.55°)
OKLab	oklab(25.48% 0.0124 -0.1162)
OKLCH	oklch(25.48% 0.117 276.1)
XYZ	xyz(2.4474, 1.4516, 9.6005)
Luminance	0.0145 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181559 #565915

analogous

#153459 #181559 #3A1559

triadic

#181559 #591815 #155918

tetradic

#181559 #591534 #565915 #15593A

square

#181559 #591534 #565915 #15593A

split-complementary

#181559 #593A15 #345915

monochromatic

#070619 #0B0927 #181559 #25218B #332CBC

Accessibility & contrast

On white

16.27

#181559 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#181559 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181559

16.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181559	#FFFFFF	#000000	##FFFFFF
##181559	1.00	16.27	1.29	16.27
#FFFFFF	16.27	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00235B

Deuteranopia (green-blind)

#001D58

Tritanopia (blue-blind)

#002835

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181559;
/* rgb */ color: rgb(24, 21, 89);
/* oklch */ color: oklch(25.5% 0.117 276.1);

Tailwind

colors: {
  custom: {
    50: '#605389',
    500: '#181559',
    950: '#000000',
  },
}

SCSS

$custom: #181559;
$custom-light: #605389;
$custom-dark: #000000;

JSON

{
  "hex": "#181559",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 89
  },
  "hsl": {
    "h": 242.647,
    "s": 61.818,
    "l": 21.569
  },
  "oklch": {
    "l": 0.25484,
    "c": 0.11688,
    "h": 276.1
  },
  "luminance": 0.01452
}

Semantic roles & 50–950 ramp

primary

#181559

secondary

#8D9139

accent

#E543DE

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020B

muted

#7A787C

Preview Lab

Preview with #181559

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

Preview Lab → · Contrast checker → · Palette generator →