#183684#183684

#183684 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.3% C 0.136 H 264.5°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#183684
RGB	rgb(24, 54, 132)
HSL	hsl(223, 69%, 31%)
HSV	hsv(223, 82%, 52%)
CMYK	cmyk(81.8%, 59.1%, 0%, 48.2%)
CIE-LAB	lab(25.25, 19.70, -46.91)
CIE-LCH	lch(25.25, 50.88, 292.78°)
OKLab	oklab(36.28% -0.013 -0.1355)
OKLCH	oklch(36.28% 0.136 264.5)
XYZ	xyz(5.8592, 4.4978, 22.3847)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183684 #846618

analogous

#186C84 #183684 #301884

triadic

#183684 #841836 #368418

tetradic

#183684 #84186C #846618 #188430

square

#183684 #84186C #846618 #188430

split-complementary

#183684 #843018 #6C8418

monochromatic

#050C1C #0F2150 #183684 #214BB8 #3B68DB

Accessibility & contrast

On white

11.05

#183684 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#183684 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183684

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183684	#FFFFFF	#000000	##FFFFFF
##183684	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004187

Deuteranopia (green-blind)

#003782

Tritanopia (blue-blind)

#004A57

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183684;
/* rgb */ color: rgb(24, 54, 132);
/* oklch */ color: oklch(36.3% 0.136 264.5);

Tailwind

colors: {
  custom: {
    50: '#686ca8',
    500: '#183684',
    950: '#000000',
  },
}

SCSS

$custom: #183684;
$custom-light: #686ca8;
$custom-dark: #000000;

JSON

{
  "hex": "#183684",
  "rgb": {
    "r": 24,
    "g": 54,
    "b": 132
  },
  "hsl": {
    "h": 223.333,
    "s": 69.231,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36281,
    "c": 0.13611,
    "h": 264.5
  },
  "luminance": 0.04498
}

Semantic roles & 50–950 ramp

primary

#183684

secondary

#B89740

accent

#BB3CEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183684

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

Preview Lab → · Contrast checker → · Palette generator →