#183C80#183C80

#183C80 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.3% C 0.122 H 261.6°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#183C80
RGB	rgb(24, 60, 128)
HSL	hsl(219, 68%, 30%)
HSV	hsv(219, 81%, 50%)
CMYK	cmyk(81.3%, 53.1%, 0%, 49.8%)
CIE-LAB	lab(26.69, 13.83, -42.08)
CIE-LCH	lch(26.69, 44.30, 288.20°)
OKLab	oklab(37.27% -0.0179 -0.1212)
OKLCH	oklch(37.27% 0.122 261.6)
XYZ	xyz(5.8874, 4.9837, 21.0696)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C80 #805C18

analogous

#187080 #183C80 #281880

triadic

#183C80 #80183C #3C8018

tetradic

#183C80 #801870 #805C18 #188028

square

#183C80 #801870 #805C18 #188028

split-complementary

#183C80 #802818 #708018

monochromatic

#050C1A #0E244C #183C80 #2254B4 #3970DA

Accessibility & contrast

On white

10.52

#183C80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#183C80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C80

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C80	#FFFFFF	#000000	##FFFFFF
##183C80	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4482

Deuteranopia (green-blind)

#003B7F

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183c80;
/* rgb */ color: rgb(24, 60, 128);
/* oklch */ color: oklch(37.3% 0.122 261.6);

Tailwind

colors: {
  custom: {
    50: '#6771a5',
    500: '#183c80',
    950: '#000000',
  },
}

SCSS

$custom: #183c80;
$custom-light: #6771a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183c80",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 128
  },
  "hsl": {
    "h": 219.231,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37268,
    "c": 0.12249,
    "h": 261.6
  },
  "luminance": 0.04984
}

Semantic roles & 50–950 ramp

primary

#183C80

secondary

#B48C40

accent

#AF3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183C80

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

Preview Lab → · Contrast checker → · Palette generator →