#181D43#181D43

#181D43 is a very dark, moderate blue. Relative luminance 0.015; OKLCH L 25.0% C 0.071 H 274.4°. Best body text is #FFFFFF at 16.21:1 contrast (WCAG AA passes).

Color values

HEX	#181D43
RGB	rgb(24, 29, 67)
HSL	hsl(233, 47%, 18%)
HSV	hsv(233, 64%, 26%)
CMYK	cmyk(64.2%, 56.7%, 0%, 73.7%)
CIE-LAB	lab(12.47, 11.28, -24.84)
CIE-LCH	lch(12.47, 27.28, 294.42°)
OKLab	oklab(24.97% 0.0055 -0.071)
OKLCH	oklch(24.97% 0.071 274.4)
XYZ	xyz(1.8288, 1.4780, 5.4980)
Luminance	0.0148 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D43 #433E18

analogous

#183243 #181D43 #281843

triadic

#181D43 #43181D #1D4318

tetradic

#181D43 #431832 #433E18 #184328

square

#181D43 #431832 #433E18 #184328

split-complementary

#181D43 #432818 #324318

monochromatic

#080A17 #080A17 #181D43 #283170 #38449D

Accessibility & contrast

On white

16.21

#181D43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#181D43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D43

16.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D43	#FFFFFF	#000000	##FFFFFF
##181D43	1.00	16.21	1.30	16.21
#FFFFFF	16.21	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#092244

Deuteranopia (green-blind)

#041F42

Tritanopia (blue-blind)

#02262C

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #181d43;
/* rgb */ color: rgb(24, 29, 67);
/* oklch */ color: oklch(25.0% 0.071 274.4);

Tailwind

colors: {
  custom: {
    50: '#595877',
    500: '#181d43',
    950: '#000000',
  },
}

SCSS

$custom: #181d43;
$custom-light: #595877;
$custom-dark: #000000;

JSON

{
  "hex": "#181d43",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 67
  },
  "hsl": {
    "h": 233.023,
    "s": 47.253,
    "l": 17.843
  },
  "oklch": {
    "l": 0.24973,
    "c": 0.0712,
    "h": 274.4
  },
  "luminance": 0.01478
}

Semantic roles & 50–950 ramp

primary

#181D43

secondary

#7A733D

accent

#C751D7

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040309

muted

#79787B

Preview Lab

Preview with #181D43

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

Preview Lab → · Contrast checker → · Palette generator →