#181D3E#181D3E

#181D3E is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.6% C 0.063 H 274.4°. Best body text is #FFFFFF at 16.35:1 contrast (WCAG AA passes).

Color values

HEX	#181D3E
RGB	rgb(24, 29, 62)
HSL	hsl(232, 44%, 17%)
HSV	hsv(232, 61%, 24%)
CMYK	cmyk(61.3%, 53.2%, 0%, 75.7%)
CIE-LAB	lab(12.09, 9.29, -21.93)
CIE-LCH	lch(12.09, 23.81, 292.95°)
OKLab	oklab(24.57% 0.0048 -0.0624)
OKLCH	oklch(24.57% 0.063 274.4)
XYZ	xyz(1.6853, 1.4206, 4.7419)
Luminance	0.0142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D3E #3E3918

analogous

#18303E #181D3E #26183E

triadic

#181D3E #3E181D #1D3E18

tetradic

#181D3E #3E1830 #3E3918 #183E26

square

#181D3E #3E1830 #3E3918 #183E26

split-complementary

#181D3E #3E2618 #303E18

monochromatic

#090A16 #090A16 #181D3E #29326A #3A4696

Accessibility & contrast

On white

16.35

#181D3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#181D3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D3E

16.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D3E	#FFFFFF	#000000	##FFFFFF
##181D3E	1.00	16.35	1.28	16.35
#FFFFFF	16.35	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E213F

Deuteranopia (green-blind)

#0A1E3D

Tritanopia (blue-blind)

#06242A

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181d3e;
/* rgb */ color: rgb(24, 29, 62);
/* oklch */ color: oklch(24.6% 0.063 274.4);

Tailwind

colors: {
  custom: {
    50: '#585873',
    500: '#181d3e',
    950: '#000000',
  },
}

SCSS

$custom: #181d3e;
$custom-light: #585873;
$custom-dark: #000000;

JSON

{
  "hex": "#181d3e",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 62
  },
  "hsl": {
    "h": 232.105,
    "s": 44.186,
    "l": 16.863
  },
  "oklch": {
    "l": 0.2457,
    "c": 0.06261,
    "h": 274.4
  },
  "luminance": 0.01421
}

Semantic roles & 50–950 ramp

primary

#181D3E

secondary

#746D3D

accent

#C354D4

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #181D3E

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

Preview Lab → · Contrast checker → · Palette generator →