#183D83#183D83

#183D83 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.7% C 0.126 H 261.6°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#183D83
RGB	rgb(24, 61, 131)
HSL	hsl(219, 69%, 30%)
HSV	hsv(219, 82%, 51%)
CMYK	cmyk(81.7%, 53.4%, 0%, 48.6%)
CIE-LAB	lab(27.21, 14.37, -43.11)
CIE-LCH	lch(27.21, 45.44, 288.43°)
OKLab	oklab(37.74% -0.0183 -0.1242)
OKLCH	oklch(37.74% 0.126 261.6)
XYZ	xyz(6.1407, 5.1696, 22.1425)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D83 #835E18

analogous

#187283 #183D83 #281883

triadic

#183D83 #83183D #3D8318

tetradic

#183D83 #831872 #835E18 #188328

square

#183D83 #831872 #835E18 #188328

split-complementary

#183D83 #832818 #728318

monochromatic

#050D1C #0F254F #183D83 #2155B7 #3A72DB

Accessibility & contrast

On white

10.32

#183D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#183D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D83

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D83	#FFFFFF	#000000	##FFFFFF
##183D83	1.00	10.32	2.03	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D4586

Deuteranopia (green-blind)

#003C82

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183d83;
/* rgb */ color: rgb(24, 61, 131);
/* oklch */ color: oklch(37.7% 0.126 261.6);

Tailwind

colors: {
  custom: {
    50: '#6771a8',
    500: '#183d83',
    950: '#000000',
  },
}

SCSS

$custom: #183d83;
$custom-light: #6771a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183d83",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 131
  },
  "hsl": {
    "h": 219.252,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37739,
    "c": 0.12552,
    "h": 261.6
  },
  "luminance": 0.0517
}

Semantic roles & 50–950 ramp

primary

#183D83

secondary

#B78E40

accent

#AF3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183D83

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

Preview Lab → · Contrast checker → · Palette generator →