#183E83#183E83

#183E83 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.0% C 0.124 H 261.1°. Best body text is #FFFFFF at 10.22:1 contrast (WCAG AA passes).

Color values

HEX	#183E83
RGB	rgb(24, 62, 131)
HSL	hsl(219, 69%, 30%)
HSV	hsv(219, 82%, 51%)
CMYK	cmyk(81.7%, 52.7%, 0%, 48.6%)
CIE-LAB	lab(27.51, 13.67, -42.63)
CIE-LCH	lch(27.51, 44.76, 287.78°)
OKLab	oklab(37.97% -0.0191 -0.1227)
OKLCH	oklch(37.97% 0.124 261.1)
XYZ	xyz(6.1946, 5.2774, 22.1605)
Luminance	0.0528 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E83 #835D18

analogous

#187383 #183E83 #281883

triadic

#183E83 #83183E #3E8318

tetradic

#183E83 #831873 #835D18 #188328

square

#183E83 #831873 #835D18 #188328

split-complementary

#183E83 #832818 #738318

monochromatic

#050D1C #0F264F #183E83 #2156B7 #3A73DB

Accessibility & contrast

On white

10.22

#183E83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#183E83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E83

10.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E83	#FFFFFF	#000000	##FFFFFF
##183E83	1.00	10.22	2.06	10.22
#FFFFFF	10.22	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#114685

Deuteranopia (green-blind)

#003C82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183e83;
/* rgb */ color: rgb(24, 62, 131);
/* oklch */ color: oklch(38.0% 0.124 261.1);

Tailwind

colors: {
  custom: {
    50: '#6772a8',
    500: '#183e83',
    950: '#000000',
  },
}

SCSS

$custom: #183e83;
$custom-light: #6772a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183e83",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 131
  },
  "hsl": {
    "h": 218.692,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37967,
    "c": 0.12421,
    "h": 261.1
  },
  "luminance": 0.05278
}

Semantic roles & 50–950 ramp

primary

#183E83

secondary

#B78D40

accent

#AD3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183E83

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

Preview Lab → · Contrast checker → · Palette generator →