#181E4B#181E4B

#181E4B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.083 H 273.4°. Best body text is #FFFFFF at 15.83:1 contrast (WCAG AA passes).

Color values

HEX	#181E4B
RGB	rgb(24, 30, 75)
HSL	hsl(233, 52%, 19%)
HSV	hsv(233, 68%, 29%)
CMYK	cmyk(68%, 60%, 0%, 70.6%)
CIE-LAB	lab(13.42, 13.75, -28.86)
CIE-LCH	lch(13.42, 31.97, 295.47°)
OKLab	oklab(25.89% 0.005 -0.0828)
OKLCH	oklch(25.89% 0.083 273.4)
XYZ	xyz(2.1105, 1.6306, 6.8588)
Luminance	0.0163 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.92

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181E4B #4B4518

analogous

#18384B #181E4B #2C184B

triadic

#181E4B #4B181E #1E4B18

tetradic

#181E4B #4B1838 #4B4518 #184B2C

square

#181E4B #4B1838 #4B4518 #184B2C

split-complementary

#181E4B #4B2C18 #384B18

monochromatic

#070917 #090B1D #181E4B #273179 #3643A8

Accessibility & contrast

On white

15.83

#181E4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#181E4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181E4B

15.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181E4B	#FFFFFF	#000000	##FFFFFF
##181E4B	1.00	15.83	1.33	15.83
#FFFFFF	15.83	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#02254D

Deuteranopia (green-blind)

#00204A

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #181e4b;
/* rgb */ color: rgb(24, 30, 75);
/* oklch */ color: oklch(25.9% 0.083 273.4);

Tailwind

colors: {
  custom: {
    50: '#5b597e',
    500: '#181e4b',
    950: '#000000',
  },
}

SCSS

$custom: #181e4b;
$custom-light: #5b597e;
$custom-dark: #000000;

JSON

{
  "hex": "#181e4b",
  "rgb": {
    "r": 24,
    "g": 30,
    "b": 75
  },
  "hsl": {
    "h": 232.941,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.2589,
    "c": 0.08296,
    "h": 273.4
  },
  "luminance": 0.01631
}

Semantic roles & 50–950 ramp

primary

#181E4B

secondary

#827A3D

accent

#CA4DDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181E4B

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

Preview Lab → · Contrast checker → · Palette generator →