#183771#183771

#183771 is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.9% C 0.107 H 261.5°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#183771
RGB	rgb(24, 55, 113)
HSL	hsl(219, 65%, 27%)
HSV	hsv(219, 79%, 44%)
CMYK	cmyk(78.8%, 51.3%, 0%, 55.7%)
CIE-LAB	lab(24.06, 11.15, -36.84)
CIE-LCH	lch(24.06, 38.49, 286.84°)
OKLab	oklab(34.9% -0.0158 -0.1058)
OKLCH	oklch(34.9% 0.107 261.5)
XYZ	xyz(4.7224, 4.1183, 16.1656)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183771 #715218

analogous

#186471 #183771 #251871

triadic

#183771 #711837 #377118

tetradic

#183771 #711864 #715218 #187125

square

#183771 #711864 #715218 #187125

split-complementary

#183771 #712518 #647118

monochromatic

#050C19 #0D1E3F #183771 #2350A3 #3069D3

Accessibility & contrast

On white

11.51

#183771 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#183771 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183771

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183771	#FFFFFF	#000000	##FFFFFF
##183771	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163E73

Deuteranopia (green-blind)

#003570

Tritanopia (blue-blind)

#00454E

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183771;
/* rgb */ color: rgb(24, 55, 113);
/* oklch */ color: oklch(34.9% 0.107 261.5);

Tailwind

colors: {
  custom: {
    50: '#636d9a',
    500: '#183771',
    950: '#000000',
  },
}

SCSS

$custom: #183771;
$custom-light: #636d9a;
$custom-dark: #000000;

JSON

{
  "hex": "#183771",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 113
  },
  "hsl": {
    "h": 219.101,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.34904,
    "c": 0.10701,
    "h": 261.5
  },
  "luminance": 0.04119
}

Semantic roles & 50–950 ramp

primary

#183771

secondary

#A6823E

accent

#AD40E8

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183771

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

Preview Lab → · Contrast checker → · Palette generator →