#181543#181543

#181543 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.2% C 0.084 H 280.5°. Best body text is #FFFFFF at 17.11:1 contrast (WCAG AA passes).

Color values

HEX	#181543
RGB	rgb(24, 21, 67)
HSL	hsl(244, 52%, 17%)
HSV	hsv(244, 69%, 26%)
CMYK	cmyk(64.2%, 68.7%, 0%, 73.7%)
CIE-LAB	lab(10.07, 17.28, -28.71)
CIE-LCH	lch(10.07, 33.51, 301.04°)
OKLab	oklab(23.19% 0.0153 -0.0825)
OKLCH	oklch(23.19% 0.084 280.5)
XYZ	xyz(1.6577, 1.1357, 5.4410)
Luminance	0.0114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181543 #404315

analogous

#152943 #181543 #2F1543

triadic

#181543 #431815 #154318

tetradic

#181543 #431529 #404315 #15432F

square

#181543 #431529 #404315 #15432F

split-complementary

#181543 #432F15 #294315

monochromatic

#080717 #080717 #181543 #292472 #3932A0

Accessibility & contrast

On white

17.11

#181543 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#181543 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181543

17.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181543	#FFFFFF	#000000	##FFFFFF
##181543	1.00	17.11	1.23	17.11
#FFFFFF	17.11	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D44

Deuteranopia (green-blind)

#001A42

Tritanopia (blue-blind)

#032029

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #181543;
/* rgb */ color: rgb(24, 21, 67);
/* oklch */ color: oklch(23.2% 0.084 280.5);

Tailwind

colors: {
  custom: {
    50: '#5a5278',
    500: '#181543',
    950: '#000000',
  },
}

SCSS

$custom: #181543;
$custom-light: #5a5278;
$custom-dark: #000000;

JSON

{
  "hex": "#181543",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 67
  },
  "hsl": {
    "h": 243.913,
    "s": 52.273,
    "l": 17.255
  },
  "oklch": {
    "l": 0.2319,
    "c": 0.08387,
    "h": 280.5
  },
  "luminance": 0.01136
}

Semantic roles & 50–950 ramp

primary

#181543

secondary

#777B39

accent

#DC4CD2

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040209

muted

#79787B

Preview Lab

Preview with #181543

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

Preview Lab → · Contrast checker → · Palette generator →