#183C83#183C83

#183C83 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.5% C 0.127 H 262.0°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#183C83
RGB	rgb(24, 60, 131)
HSL	hsl(220, 69%, 30%)
HSV	hsv(220, 82%, 51%)
CMYK	cmyk(81.7%, 54.2%, 0%, 48.6%)
CIE-LAB	lab(26.92, 15.07, -43.59)
CIE-LCH	lch(26.92, 46.12, 289.07°)
OKLab	oklab(37.51% -0.0175 -0.1256)
OKLCH	oklch(37.51% 0.127 262)
XYZ	xyz(6.0878, 5.0639, 22.1249)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C83 #835F18

analogous

#187183 #183C83 #291883

triadic

#183C83 #83183C #3C8318

tetradic

#183C83 #831871 #835F18 #188329

square

#183C83 #831871 #835F18 #188329

split-complementary

#183C83 #832918 #718318

monochromatic

#050D1C #0F244F #183C83 #2154B7 #3A70DB

Accessibility & contrast

On white

10.43

#183C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#183C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C83

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C83	#FFFFFF	#000000	##FFFFFF
##183C83	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#084586

Deuteranopia (green-blind)

#003B82

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183c83;
/* rgb */ color: rgb(24, 60, 131);
/* oklch */ color: oklch(37.5% 0.127 262.0);

Tailwind

colors: {
  custom: {
    50: '#6871a8',
    500: '#183c83',
    950: '#000000',
  },
}

SCSS

$custom: #183c83;
$custom-light: #6871a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183c83",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 131
  },
  "hsl": {
    "h": 219.813,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37513,
    "c": 0.12682,
    "h": 262
  },
  "luminance": 0.05065
}

Semantic roles & 50–950 ramp

primary

#183C83

secondary

#B78F40

accent

#B13CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183C83

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

Preview Lab → · Contrast checker → · Palette generator →