#181237#181237

#181237 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.4% C 0.069 H 286.4°. Best body text is #FFFFFF at 17.79:1 contrast (WCAG AA passes).

Color values

HEX	#181237
RGB	rgb(24, 18, 55)
HSL	hsl(250, 51%, 14%)
HSV	hsv(250, 67%, 22%)
CMYK	cmyk(56.4%, 67.3%, 0%, 78.4%)
CIE-LAB	lab(8.15, 14.93, -23.26)
CIE-LCH	lch(8.15, 27.64, 302.70°)
OKLab	oklab(21.44% 0.0196 -0.0664)
OKLCH	oklch(21.44% 0.069 286.4)
XYZ	xyz(1.2824, 0.9026, 3.7203)
Luminance	0.0090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181237 #313712

analogous

#121F37 #181237 #2B1237

triadic

#181237 #371812 #123718

tetradic

#181237 #37121F #313712 #12372B

square

#181237 #37121F #313712 #12372B

split-complementary

#181237 #372B12 #1F3712

monochromatic

#0A0817 #0A0817 #181237 #2C2165 #403093

Accessibility & contrast

On white

17.79

#181237 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#181237 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181237

17.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181237	#FFFFFF	#000000	##FFFFFF
##181237	1.00	17.79	1.18	17.79
#FFFFFF	17.79	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001938

Deuteranopia (green-blind)

#001736

Tritanopia (blue-blind)

#0D1A22

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #181237;
/* rgb */ color: rgb(24, 18, 55);
/* oklch */ color: oklch(21.4% 0.069 286.4);

Tailwind

colors: {
  custom: {
    50: '#584f6e',
    500: '#181237',
    950: '#000000',
  },
}

SCSS

$custom: #181237;
$custom-light: #584f6e;
$custom-dark: #000000;

JSON

{
  "hex": "#181237",
  "rgb": {
    "r": 24,
    "g": 18,
    "b": 55
  },
  "hsl": {
    "h": 249.73,
    "s": 50.685,
    "l": 14.314
  },
  "oklch": {
    "l": 0.21438,
    "c": 0.06927,
    "h": 286.4
  },
  "luminance": 0.00903
}

Semantic roles & 50–950 ramp

primary

#181237

secondary

#667035

accent

#DA4EC3

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #181237

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

Preview Lab → · Contrast checker → · Palette generator →