#183583#183583

#183583 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.0% C 0.136 H 264.8°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#183583
RGB	rgb(24, 53, 131)
HSL	hsl(224, 69%, 30%)
HSV	hsv(224, 82%, 51%)
CMYK	cmyk(81.7%, 59.5%, 0%, 48.6%)
CIE-LAB	lab(24.88, 20.00, -46.89)
CIE-LCH	lch(24.88, 50.97, 293.10°)
OKLab	oklab(35.98% -0.0124 -0.1354)
OKLCH	oklch(35.98% 0.136 264.8)
XYZ	xyz(5.7451, 4.3784, 22.0107)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183583 #836618

analogous

#186A83 #183583 #301883

triadic

#183583 #831835 #358318

tetradic

#183583 #83186A #836618 #188330

square

#183583 #83186A #836618 #188330

split-complementary

#183583 #833018 #6A8318

monochromatic

#050B1C #0F204F #183583 #214AB7 #3A66DB

Accessibility & contrast

On white

11.20

#183583 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#183583 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183583

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183583	#FFFFFF	#000000	##FFFFFF
##183583	1.00	11.20	1.88	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004086

Deuteranopia (green-blind)

#003681

Tritanopia (blue-blind)

#004956

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183583;
/* rgb */ color: rgb(24, 53, 131);
/* oklch */ color: oklch(36.0% 0.136 264.8);

Tailwind

colors: {
  custom: {
    50: '#686ba8',
    500: '#183583',
    950: '#000000',
  },
}

SCSS

$custom: #183583;
$custom-light: #686ba8;
$custom-dark: #000000;

JSON

{
  "hex": "#183583",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 131
  },
  "hsl": {
    "h": 223.738,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.35978,
    "c": 0.13599,
    "h": 264.8
  },
  "luminance": 0.04379
}

Semantic roles & 50–950 ramp

primary

#183583

secondary

#B79740

accent

#BC3CEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #183583

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

Preview Lab → · Contrast checker → · Palette generator →