#181D3D#181D3D

#181D3D is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.5% C 0.061 H 274.3°. Best body text is #FFFFFF at 16.38:1 contrast (WCAG AA passes).

Color values

HEX	#181D3D
RGB	rgb(24, 29, 61)
HSL	hsl(232, 44%, 17%)
HSV	hsv(232, 61%, 24%)
CMYK	cmyk(60.7%, 52.5%, 0%, 76.1%)
CIE-LAB	lab(12.02, 8.89, -21.34)
CIE-LCH	lch(12.02, 23.11, 292.62°)
OKLab	oklab(24.49% 0.0046 -0.0607)
OKLCH	oklch(24.49% 0.061 274.3)
XYZ	xyz(1.6581, 1.4097, 4.5987)
Luminance	0.0141 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D3D #3D3818

analogous

#18303D #181D3D #26183D

triadic

#181D3D #3D181D #1D3D18

tetradic

#181D3D #3D1830 #3D3818 #183D26

square

#181D3D #3D1830 #3D3818 #183D26

split-complementary

#181D3D #3D2618 #303D18

monochromatic

#090A16 #090A16 #181D3D #293269 #3B4795

Accessibility & contrast

On white

16.38

#181D3D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#181D3D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D3D

16.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D3D	#FFFFFF	#000000	##FFFFFF
##181D3D	1.00	16.38	1.28	16.38
#FFFFFF	16.38	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F213E

Deuteranopia (green-blind)

#0B1E3C

Tritanopia (blue-blind)

#07242A

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181d3d;
/* rgb */ color: rgb(24, 29, 61);
/* oklch */ color: oklch(24.5% 0.061 274.3);

Tailwind

colors: {
  custom: {
    50: '#585873',
    500: '#181d3d',
    950: '#000000',
  },
}

SCSS

$custom: #181d3d;
$custom-light: #585873;
$custom-dark: #000000;

JSON

{
  "hex": "#181d3d",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 61
  },
  "hsl": {
    "h": 231.892,
    "s": 43.529,
    "l": 16.667
  },
  "oklch": {
    "l": 0.24492,
    "c": 0.06086,
    "h": 274.3
  },
  "luminance": 0.0141
}

Semantic roles & 50–950 ramp

primary

#181D3D

secondary

#736C3D

accent

#C255D3

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #181D3D

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

Preview Lab → · Contrast checker → · Palette generator →