#183C84#183C84

#183C84 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.6% C 0.128 H 262.2°. Best body text is #FFFFFF at 10.40:1 contrast (WCAG AA passes).

Color values

HEX	#183C84
RGB	rgb(24, 60, 132)
HSL	hsl(220, 69%, 31%)
HSV	hsv(220, 82%, 52%)
CMYK	cmyk(81.8%, 54.5%, 0%, 48.2%)
CIE-LAB	lab(26.99, 15.48, -44.09)
CIE-LCH	lch(26.99, 46.73, 289.35°)
OKLab	oklab(37.6% -0.0174 -0.1271)
OKLCH	oklch(37.6% 0.128 262.2)
XYZ	xyz(6.1559, 5.0911, 22.4836)
Luminance	0.0509 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C84 #846018

analogous

#187284 #183C84 #2A1884

triadic

#183C84 #84183C #3C8418

tetradic

#183C84 #841872 #846018 #18842A

square

#183C84 #841872 #846018 #18842A

split-complementary

#183C84 #842A18 #728418

monochromatic

#050D1C #0F2450 #183C84 #2154B8 #3B70DB

Accessibility & contrast

On white

10.40

#183C84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#183C84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C84

10.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C84	#FFFFFF	#000000	##FFFFFF
##183C84	1.00	10.40	2.02	10.40
#FFFFFF	10.40	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#064587

Deuteranopia (green-blind)

#003B83

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183c84;
/* rgb */ color: rgb(24, 60, 132);
/* oklch */ color: oklch(37.6% 0.128 262.2);

Tailwind

colors: {
  custom: {
    50: '#6871a8',
    500: '#183c84',
    950: '#000000',
  },
}

SCSS

$custom: #183c84;
$custom-light: #6871a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183c84",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 132
  },
  "hsl": {
    "h": 220,
    "s": 69.231,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37596,
    "c": 0.12826,
    "h": 262.2
  },
  "luminance": 0.05092
}

Semantic roles & 50–950 ramp

primary

#183C84

secondary

#B89040

accent

#B13CEC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183C84

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

Preview Lab → · Contrast checker → · Palette generator →