#181541#181541

#181541 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.0% C 0.081 H 281.0°. Best body text is #FFFFFF at 17.18:1 contrast (WCAG AA passes).

Color values

HEX	#181541
RGB	rgb(24, 21, 65)
HSL	hsl(244, 51%, 17%)
HSV	hsv(244, 68%, 25%)
CMYK	cmyk(63.1%, 67.7%, 0%, 74.5%)
CIE-LAB	lab(9.89, 16.50, -27.59)
CIE-LCH	lch(9.89, 32.15, 300.88°)
OKLab	oklab(23% 0.0154 -0.0792)
OKLCH	oklch(23% 0.081 281)
XYZ	xyz(1.5987, 1.1121, 5.1304)
Luminance	0.0111 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181541 #3E4115

analogous

#152841 #181541 #2E1541

triadic

#181541 #411815 #154118

tetradic

#181541 #411528 #3E4115 #15412E

square

#181541 #411528 #3E4115 #15412E

split-complementary

#181541 #412E15 #284115

monochromatic

#090717 #090717 #181541 #29246F #3A339E

Accessibility & contrast

On white

17.18

#181541 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#181541 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181541

17.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181541	#FFFFFF	#000000	##FFFFFF
##181541	1.00	17.18	1.22	17.18
#FFFFFF	17.18	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D42

Deuteranopia (green-blind)

#001A40

Tritanopia (blue-blind)

#051F28

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #181541;
/* rgb */ color: rgb(24, 21, 65);
/* oklch */ color: oklch(23.0% 0.081 281.0);

Tailwind

colors: {
  custom: {
    50: '#5a5276',
    500: '#181541',
    950: '#000000',
  },
}

SCSS

$custom: #181541;
$custom-light: #5a5276;
$custom-dark: #000000;

JSON

{
  "hex": "#181541",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 65
  },
  "hsl": {
    "h": 244.091,
    "s": 51.163,
    "l": 16.863
  },
  "oklch": {
    "l": 0.22999,
    "c": 0.08067,
    "h": 281
  },
  "luminance": 0.01112
}

Semantic roles & 50–950 ramp

primary

#181541

secondary

#747939

accent

#DB4DD1

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #181541

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

Preview Lab → · Contrast checker → · Palette generator →