#183783#183783

#183783 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.4% C 0.133 H 264.1°. Best body text is #FFFFFF at 10.98:1 contrast (WCAG AA passes).

Color values

HEX	#183783
RGB	rgb(24, 55, 131)
HSL	hsl(223, 69%, 30%)
HSV	hsv(223, 82%, 51%)
CMYK	cmyk(81.7%, 58%, 0%, 48.6%)
CIE-LAB	lab(25.46, 18.59, -45.96)
CIE-LCH	lch(25.46, 49.57, 292.02°)
OKLab	oklab(36.41% -0.0138 -0.1327)
OKLCH	oklch(36.41% 0.133 264.1)
XYZ	xyz(5.8382, 4.5646, 22.0417)
Luminance	0.0457 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183783 #836418

analogous

#186C83 #183783 #2F1883

triadic

#183783 #831837 #378318

tetradic

#183783 #83186C #836418 #18832F

square

#183783 #83186C #836418 #18832F

split-complementary

#183783 #832F18 #6C8318

monochromatic

#050C1C #0F214F #183783 #214DB7 #3A69DB

Accessibility & contrast

On white

10.98

#183783 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183783 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183783

10.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183783	#FFFFFF	#000000	##FFFFFF
##183783	1.00	10.98	1.91	10.98
#FFFFFF	10.98	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004186

Deuteranopia (green-blind)

#003882

Tritanopia (blue-blind)

#004A57

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183783;
/* rgb */ color: rgb(24, 55, 131);
/* oklch */ color: oklch(36.4% 0.133 264.1);

Tailwind

colors: {
  custom: {
    50: '#686da8',
    500: '#183783',
    950: '#000000',
  },
}

SCSS

$custom: #183783;
$custom-light: #686da8;
$custom-dark: #000000;

JSON

{
  "hex": "#183783",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 131
  },
  "hsl": {
    "h": 222.617,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.36408,
    "c": 0.13338,
    "h": 264.1
  },
  "luminance": 0.04565
}

Semantic roles & 50–950 ramp

primary

#183783

secondary

#B79440

accent

#B93CEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183783

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

Preview Lab → · Contrast checker → · Palette generator →