#183D84#183D84

#183D84 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.8% C 0.127 H 261.8°. Best body text is #FFFFFF at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#183D84
RGB	rgb(24, 61, 132)
HSL	hsl(219, 69%, 31%)
HSV	hsv(219, 82%, 52%)
CMYK	cmyk(81.8%, 53.8%, 0%, 48.2%)
CIE-LAB	lab(27.29, 14.78, -43.61)
CIE-LCH	lch(27.29, 46.05, 288.72°)
OKLab	oklab(37.82% -0.0182 -0.1256)
OKLCH	oklch(37.82% 0.127 261.8)
XYZ	xyz(6.2088, 5.1969, 22.5012)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D84 #845F18

analogous

#187384 #183D84 #291884

triadic

#183D84 #84183D #3D8418

tetradic

#183D84 #841873 #845F18 #188429

square

#183D84 #841873 #845F18 #188429

split-complementary

#183D84 #842918 #738418

monochromatic

#050D1C #0F2550 #183D84 #2155B8 #3B72DB

Accessibility & contrast

On white

10.30

#183D84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#183D84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D84

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D84	#FFFFFF	#000000	##FFFFFF
##183D84	1.00	10.30	2.04	10.30
#FFFFFF	10.30	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B4687

Deuteranopia (green-blind)

#003C83

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183d84;
/* rgb */ color: rgb(24, 61, 132);
/* oklch */ color: oklch(37.8% 0.127 261.8);

Tailwind

colors: {
  custom: {
    50: '#6871a8',
    500: '#183d84',
    950: '#000000',
  },
}

SCSS

$custom: #183d84;
$custom-light: #6871a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183d84",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 132
  },
  "hsl": {
    "h": 219.444,
    "s": 69.231,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37821,
    "c": 0.12695,
    "h": 261.8
  },
  "luminance": 0.05198
}

Semantic roles & 50–950 ramp

primary

#183D84

secondary

#B88F40

accent

#B03CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183D84

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

Preview Lab → · Contrast checker → · Palette generator →