#183788#183788

#183788 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.140 H 264.5°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#183788
RGB	rgb(24, 55, 136)
HSL	hsl(223, 70%, 31%)
HSV	hsv(223, 82%, 53%)
CMYK	cmyk(82.4%, 59.6%, 0%, 46.7%)
CIE-LAB	lab(25.87, 20.63, -48.40)
CIE-LCH	lch(25.87, 52.61, 293.08°)
OKLab	oklab(36.85% -0.0135 -0.1398)
OKLCH	oklch(36.85% 0.14 264.5)
XYZ	xyz(6.1852, 4.7034, 23.8696)
Luminance	0.0470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183788 #886918

analogous

#186F88 #183788 #311888

triadic

#183788 #881837 #378818

tetradic

#183788 #88186F #886918 #188831

square

#183788 #88186F #886918 #188831

split-complementary

#183788 #883118 #6F8818

monochromatic

#060D20 #0F2254 #183788 #214CBC #3E6ADD

Accessibility & contrast

On white

10.82

#183788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#183788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183788

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183788	#FFFFFF	#000000	##FFFFFF
##183788	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438B

Deuteranopia (green-blind)

#003886

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183788;
/* rgb */ color: rgb(24, 55, 136);
/* oklch */ color: oklch(36.9% 0.140 264.5);

Tailwind

colors: {
  custom: {
    50: '#696dab',
    500: '#183788',
    950: '#000000',
  },
}

SCSS

$custom: #183788;
$custom-light: #696dab;
$custom-dark: #000000;

JSON

{
  "hex": "#183788",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 136
  },
  "hsl": {
    "h": 223.393,
    "s": 70,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36851,
    "c": 0.14049,
    "h": 264.5
  },
  "luminance": 0.04704
}

Semantic roles & 50–950 ramp

primary

#183788

secondary

#BC9940

accent

#BC3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183788

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

Preview Lab → · Contrast checker → · Palette generator →