#183383#183383

#183383 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.6% C 0.139 H 265.5°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX	#183383
RGB	rgb(24, 51, 131)
HSL	hsl(225, 69%, 30%)
HSV	hsv(225, 82%, 51%)
CMYK	cmyk(81.7%, 61.1%, 0%, 48.6%)
CIE-LAB	lab(24.32, 21.40, -47.81)
CIE-LCH	lch(24.32, 52.38, 294.12°)
OKLab	oklab(35.56% -0.011 -0.1382)
OKLCH	oklch(35.56% 0.139 265.5)
XYZ	xyz(5.6558, 4.1999, 21.9809)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183383 #836818

analogous

#186883 #183383 #331883

triadic

#183383 #831833 #338318

tetradic

#183383 #831868 #836818 #188333

square

#183383 #831868 #836818 #188333

split-complementary

#183383 #833318 #688318

monochromatic

#050B1C #0F1F4F #183383 #2147B7 #3A63DB

Accessibility & contrast

On white

11.41

#183383 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#183383 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183383

11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183383	#FFFFFF	#000000	##FFFFFF
##183383	1.00	11.41	1.84	11.41
#FFFFFF	11.41	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F86

Deuteranopia (green-blind)

#003581

Tritanopia (blue-blind)

#004755

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183383;
/* rgb */ color: rgb(24, 51, 131);
/* oklch */ color: oklch(35.6% 0.139 265.5);

Tailwind

colors: {
  custom: {
    50: '#686aa8',
    500: '#183383',
    950: '#000000',
  },
}

SCSS

$custom: #183383;
$custom-light: #686aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#183383",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 131
  },
  "hsl": {
    "h": 224.86,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.35556,
    "c": 0.1386,
    "h": 265.5
  },
  "luminance": 0.04201
}

Semantic roles & 50–950 ramp

primary

#183383

secondary

#B79940

accent

#BF3CEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #183383

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

Preview Lab → · Contrast checker → · Palette generator →