#183F80#183F80

#183F80 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.0% C 0.119 H 260.1°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#183F80
RGB	rgb(24, 63, 128)
HSL	hsl(218, 68%, 30%)
HSV	hsv(218, 81%, 50%)
CMYK	cmyk(81.3%, 50.8%, 0%, 49.8%)
CIE-LAB	lab(27.59, 11.73, -40.62)
CIE-LCH	lch(27.59, 42.28, 286.11°)
OKLab	oklab(37.96% -0.0204 -0.1168)
OKLCH	oklch(37.96% 0.119 260.1)
XYZ	xyz(6.0491, 5.3070, 21.1234)
Luminance	0.0531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F80 #805918

analogous

#187380 #183F80 #251880

triadic

#183F80 #80183F #3F8018

tetradic

#183F80 #801873 #805918 #188025

square

#183F80 #801873 #805918 #188025

split-complementary

#183F80 #802518 #738018

monochromatic

#050D1A #0E264C #183F80 #2258B4 #3975DA

Accessibility & contrast

On white

10.19

#183F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#183F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F80

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F80	#FFFFFF	#000000	##FFFFFF
##183F80	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194682

Deuteranopia (green-blind)

#003D7F

Tritanopia (blue-blind)

#004F59

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183f80;
/* rgb */ color: rgb(24, 63, 128);
/* oklch */ color: oklch(38.0% 0.119 260.1);

Tailwind

colors: {
  custom: {
    50: '#6773a5',
    500: '#183f80',
    950: '#000000',
  },
}

SCSS

$custom: #183f80;
$custom-light: #6773a5;
$custom-dark: #000000;

JSON

{
  "hex": "#183f80",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 128
  },
  "hsl": {
    "h": 217.5,
    "s": 68.421,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37959,
    "c": 0.11857,
    "h": 260.1
  },
  "luminance": 0.05308
}

Semantic roles & 50–950 ramp

primary

#183F80

secondary

#B48840

accent

#AA3DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183F80

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

Preview Lab → · Contrast checker → · Palette generator →