#183371#183371

#183371 is a dark, moderate blue. Relative luminance 0.038; OKLCH L 34.0% C 0.112 H 263.7°. Best body text is #FFFFFF at 11.99:1 contrast (WCAG AA passes).

Color values

HEX	#183371
RGB	rgb(24, 51, 113)
HSL	hsl(222, 65%, 27%)
HSV	hsv(222, 79%, 44%)
CMYK	cmyk(78.8%, 54.9%, 0%, 55.7%)
CIE-LAB	lab(22.84, 14.01, -38.81)
CIE-LCH	lch(22.84, 41.26, 289.85°)
OKLab	oklab(33.97% -0.0122 -0.1117)
OKLCH	oklch(33.97% 0.112 263.7)
XYZ	xyz(4.5401, 3.7536, 16.1048)
Luminance	0.0375 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183371 #715618

analogous

#186071 #183371 #2A1871

triadic

#183371 #711833 #337118

tetradic

#183371 #711860 #715618 #18712A

square

#183371 #711860 #715618 #18712A

split-complementary

#183371 #712A18 #607118

monochromatic

#050B19 #0D1C3F #183371 #234AA3 #3062D3

Accessibility & contrast

On white

11.99

#183371 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#183371 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183371

11.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183371	#FFFFFF	#000000	##FFFFFF
##183371	1.00	11.99	1.75	11.99
#FFFFFF	11.99	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#083B73

Deuteranopia (green-blind)

#003370

Tritanopia (blue-blind)

#00424C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #183371;
/* rgb */ color: rgb(24, 51, 113);
/* oklch */ color: oklch(34.0% 0.112 263.7);

Tailwind

colors: {
  custom: {
    50: '#636a9a',
    500: '#183371',
    950: '#000000',
  },
}

SCSS

$custom: #183371;
$custom-light: #636a9a;
$custom-dark: #000000;

JSON

{
  "hex": "#183371",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 113
  },
  "hsl": {
    "h": 221.798,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.33974,
    "c": 0.11238,
    "h": 263.7
  },
  "luminance": 0.03754
}

Semantic roles & 50–950 ramp

primary

#183371

secondary

#A6873E

accent

#B540E8

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #183371

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

Preview Lab → · Contrast checker → · Palette generator →