#181B4B#181B4B

#181B4B is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.2% C 0.088 H 275.5°. Best body text is #FFFFFF at 16.19:1 contrast (WCAG AA passes).

Color values

HEX	#181B4B
RGB	rgb(24, 27, 75)
HSL	hsl(236, 52%, 19%)
HSV	hsv(236, 68%, 29%)
CMYK	cmyk(68%, 64%, 0%, 70.6%)
CIE-LAB	lab(12.52, 15.99, -30.32)
CIE-LCH	lch(12.52, 34.27, 297.81°)
OKLab	oklab(25.22% 0.0083 -0.0871)
OKLCH	oklch(25.22% 0.088 275.5)
XYZ	xyz(2.0382, 1.4859, 6.8346)
Luminance	0.0149 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B4B #4B4818

analogous

#18354B #181B4B #2F184B

triadic

#181B4B #4B181B #1B4B18

tetradic

#181B4B #4B1835 #4B4818 #184B2F

square

#181B4B #4B1835 #4B4818 #184B2F

split-complementary

#181B4B #4B2F18 #354B18

monochromatic

#070817 #090A1D #181B4B #272C79 #363CA8

Accessibility & contrast

On white

16.19

#181B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#181B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B4B

16.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B4B	#FFFFFF	#000000	##FFFFFF
##181B4B	1.00	16.19	1.30	16.19
#FFFFFF	16.19	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234D

Deuteranopia (green-blind)

#001E4A

Tritanopia (blue-blind)

#002730

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181b4b;
/* rgb */ color: rgb(24, 27, 75);
/* oklch */ color: oklch(25.2% 0.088 275.5);

Tailwind

colors: {
  custom: {
    50: '#5b577e',
    500: '#181b4b',
    950: '#000000',
  },
}

SCSS

$custom: #181b4b;
$custom-light: #5b577e;
$custom-dark: #000000;

JSON

{
  "hex": "#181b4b",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 75
  },
  "hsl": {
    "h": 236.471,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.25221,
    "c": 0.08752,
    "h": 275.5
  },
  "luminance": 0.01486
}

Semantic roles & 50–950 ramp

primary

#181B4B

secondary

#827E3D

accent

#D34DDB

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181B4B

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

Preview Lab → · Contrast checker → · Palette generator →