#181537#181537

#181537 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.1% C 0.064 H 283.8°. Best body text is #FFFFFF at 17.48:1 contrast (WCAG AA passes).

Color values

HEX	#181537
RGB	rgb(24, 21, 55)
HSL	hsl(245, 45%, 15%)
HSV	hsv(245, 62%, 22%)
CMYK	cmyk(56.4%, 61.8%, 0%, 78.4%)
CIE-LAB	lab(9.04, 12.67, -21.82)
CIE-LCH	lch(9.04, 25.23, 300.13°)
OKLab	oklab(22.1% 0.0153 -0.0622)
OKLCH	oklch(22.1% 0.064 283.8)
XYZ	xyz(1.3342, 1.0063, 3.7376)
Luminance	0.0101 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.08

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181537 #343715

analogous

#152337 #181537 #291537

triadic

#181537 #371815 #153718

tetradic

#181537 #371523 #343715 #153729

square

#181537 #371523 #343715 #153729

split-complementary

#181537 #372915 #233715

monochromatic

#0A0816 #0A0816 #181537 #2B2663 #3F3790

Accessibility & contrast

On white

17.48

#181537 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#181537 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181537

17.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181537	#FFFFFF	#000000	##FFFFFF
##181537	1.00	17.48	1.20	17.48
#FFFFFF	17.48	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051B38

Deuteranopia (green-blind)

#041836

Tritanopia (blue-blind)

#0D1C23

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #181537;
/* rgb */ color: rgb(24, 21, 55);
/* oklch */ color: oklch(22.1% 0.064 283.8);

Tailwind

colors: {
  custom: {
    50: '#58526e',
    500: '#181537',
    950: '#000000',
  },
}

SCSS

$custom: #181537;
$custom-light: #58526e;
$custom-dark: #000000;

JSON

{
  "hex": "#181537",
  "rgb": {
    "r": 24,
    "g": 21,
    "b": 55
  },
  "hsl": {
    "h": 245.294,
    "s": 44.737,
    "l": 14.902
  },
  "oklch": {
    "l": 0.221,
    "c": 0.06405,
    "h": 283.8
  },
  "luminance": 0.01006
}

Semantic roles & 50–950 ramp

primary

#181537

secondary

#6A6E3A

accent

#D453C9

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #181537

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

Preview Lab → · Contrast checker → · Palette generator →