#183683#183683

#183683 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.135 H 264.4°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#183683
RGB	rgb(24, 54, 131)
HSL	hsl(223, 69%, 30%)
HSV	hsv(223, 82%, 51%)
CMYK	cmyk(81.7%, 58.8%, 0%, 48.6%)
CIE-LAB	lab(25.17, 19.29, -46.42)
CIE-LCH	lch(25.17, 50.27, 292.57°)
OKLab	oklab(36.19% -0.0131 -0.1341)
OKLCH	oklch(36.19% 0.135 264.4)
XYZ	xyz(5.7911, 4.4705, 22.0260)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183683 #836518

analogous

#186B83 #183683 #301883

triadic

#183683 #831836 #368318

tetradic

#183683 #83186B #836518 #188330

square

#183683 #83186B #836518 #188330

split-complementary

#183683 #833018 #6B8318

monochromatic

#050B1C #0F214F #183683 #214BB7 #3A67DB

Accessibility & contrast

On white

11.09

#183683 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183683 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183683

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183683	#FFFFFF	#000000	##FFFFFF
##183683	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004186

Deuteranopia (green-blind)

#003782

Tritanopia (blue-blind)

#004957

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183683;
/* rgb */ color: rgb(24, 54, 131);
/* oklch */ color: oklch(36.2% 0.135 264.4);

Tailwind

colors: {
  custom: {
    50: '#686ca8',
    500: '#183683',
    950: '#000000',
  },
}

SCSS

$custom: #183683;
$custom-light: #686ca8;
$custom-dark: #000000;

JSON

{
  "hex": "#183683",
  "rgb": {
    "r": 24,
    "g": 54,
    "b": 131
  },
  "hsl": {
    "h": 223.178,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.36192,
    "c": 0.1347,
    "h": 264.4
  },
  "luminance": 0.04471
}

Semantic roles & 50–950 ramp

primary

#183683

secondary

#B79640

accent

#BB3CEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #183683

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

Preview Lab → · Contrast checker → · Palette generator →