#181552#181552

#181552 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.7% C 0.107 H 277.3°. Best body text is #FFFFFF at 16.56:1 contrast (WCAG AA passes).

Color values

HEX	#181552
RGB	rgb(24, 21, 82)
HSL	hsl(243, 59%, 20%)
HSV	hsv(243, 74%, 32%)
CMYK	cmyk(70.7%, 74.4%, 0%, 67.8%)
CIE-LAB	lab(11.55, 23.04, -36.70)
CIE-LCH	lch(11.55, 43.34, 302.12°)
OKLab	oklab(24.72% 0.0137 -0.1059)
OKLCH	oklch(24.72% 0.107 277.3)
XYZ	xyz(2.1674, 1.3395, 8.1253)
Luminance	0.0134 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181552 #4F5215

analogous

#153052 #181552 #361552

triadic

#181552 #521815 #155218

tetradic

#181552 #521530 #4F5215 #155236

square

#181552 #521530 #4F5215 #155236

split-complementary

#181552 #523615 #305215

monochromatic

#070618 #0A0921 #181552 #262183 #352EB3

Accessibility & contrast

On white

16.56

#181552 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181552 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181552

16.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181552	#FFFFFF	#000000	##FFFFFF
##181552	1.00	16.56	1.27	16.56
#FFFFFF	16.56	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002154

Deuteranopia (green-blind)

#001C51

Tritanopia (blue-blind)

#002531

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181552;
/* rgb */ color: rgb(24, 21, 82);
/* oklch */ color: oklch(24.7% 0.107 277.3);

Tailwind

colors: {
  custom: {
    50: '#5e5383',
    500: '#181552',
    950: '#000000',
  },
}

SCSS

$custom: #181552;
$custom-light: #5e5383;
$custom-dark: #000000;

JSON

{
  "hex": "#181552",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 82
  },
  "hsl": {
    "h": 242.951,
    "s": 59.223,
    "l": 20.196
  },
  "oklch": {
    "l": 0.2472,
    "c": 0.10679,
    "h": 277.3
  },
  "luminance": 0.0134
}

Semantic roles & 50–950 ramp

primary

#181552

secondary

#868A39

accent

#E245DB

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #181552

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

Preview Lab → · Contrast checker → · Palette generator →