#181D4A#181D4A

#181D4A is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.6% C 0.083 H 274.2°. Best body text is #FFFFFF at 15.99:1 contrast (WCAG AA passes).

Color values

HEX	#181D4A
RGB	rgb(24, 29, 74)
HSL	hsl(234, 51%, 19%)
HSV	hsv(234, 68%, 29%)
CMYK	cmyk(67.6%, 60.8%, 0%, 71%)
CIE-LAB	lab(13.03, 14.09, -28.80)
CIE-LCH	lch(13.03, 32.06, 296.08°)
OKLab	oklab(25.57% 0.0061 -0.0826)
OKLCH	oklch(25.57% 0.083 274.2)
XYZ	xyz(2.0517, 1.5672, 6.6716)
Luminance	0.0157 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.64

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181D4A #4A4518

analogous

#18364A #181D4A #2C184A

triadic

#181D4A #4A181D #1D4A18

tetradic

#181D4A #4A1836 #4A4518 #184A2C

square

#181D4A #4A1836 #4A4518 #184A2C

split-complementary

#181D4A #4A2C18 #364A18

monochromatic

#070917 #090B1C #181D4A #272F78 #3641A6

Accessibility & contrast

On white

15.99

#181D4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181D4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181D4A

15.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181D4A	#FFFFFF	#000000	##FFFFFF
##181D4A	1.00	15.99	1.31	15.99
#FFFFFF	15.99	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	15.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01244C

Deuteranopia (green-blind)

#001F49

Tritanopia (blue-blind)

#002830

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181d4a;
/* rgb */ color: rgb(24, 29, 74);
/* oklch */ color: oklch(25.6% 0.083 274.2);

Tailwind

colors: {
  custom: {
    50: '#5b587d',
    500: '#181d4a',
    950: '#000000',
  },
}

SCSS

$custom: #181d4a;
$custom-light: #5b587d;
$custom-dark: #000000;

JSON

{
  "hex": "#181d4a",
  "rgb": {
    "r": 24,
    "g": 29,
    "b": 74
  },
  "hsl": {
    "h": 234,
    "s": 51.02,
    "l": 19.216
  },
  "oklch": {
    "l": 0.25574,
    "c": 0.08285,
    "h": 274.2
  },
  "luminance": 0.01567
}

Semantic roles & 50–950 ramp

primary

#181D4A

secondary

#817A3D

accent

#CC4DDA

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #181D4A

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

Preview Lab → · Contrast checker → · Palette generator →