#183E79#183E79

#183E79 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.2% C 0.110 H 259.1°. Best body text is #FFFFFF at 10.48:1 contrast (WCAG AA passes).

Color values

HEX	#183E79
RGB	rgb(24, 62, 121)
HSL	hsl(216, 67%, 28%)
HSV	hsv(216, 80%, 47%)
CMYK	cmyk(80.2%, 48.8%, 0%, 52.5%)
CIE-LAB	lab(26.79, 9.53, -37.52)
CIE-LCH	lch(26.79, 38.71, 284.25°)
OKLab	oklab(37.18% -0.0207 -0.1077)
OKLCH	oklch(37.18% 0.11 259.1)
XYZ	xyz(5.5492, 5.0193, 18.7618)
Luminance	0.0502 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E79 #795318

analogous

#186E79 #183E79 #221879

triadic

#183E79 #79183E #3E7918

tetradic

#183E79 #79186E #795318 #187922

square

#183E79 #79186E #795318 #187922

split-complementary

#183E79 #792218 #6E7918

monochromatic

#050D1A #0E2446 #183E79 #2258AC #3574D7

Accessibility & contrast

On white

10.48

#183E79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#183E79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E79

10.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E79	#FFFFFF	#000000	##FFFFFF
##183E79	1.00	10.48	2.00	10.48
#FFFFFF	10.48	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E447B

Deuteranopia (green-blind)

#043B78

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183e79;
/* rgb */ color: rgb(24, 62, 121);
/* oklch */ color: oklch(37.2% 0.110 259.1);

Tailwind

colors: {
  custom: {
    50: '#6572a0',
    500: '#183e79',
    950: '#000000',
  },
}

SCSS

$custom: #183e79;
$custom-light: #6572a0;
$custom-dark: #000000;

JSON

{
  "hex": "#183e79",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 121
  },
  "hsl": {
    "h": 216.495,
    "s": 66.897,
    "l": 28.431
  },
  "oklch": {
    "l": 0.37183,
    "c": 0.10967,
    "h": 259.1
  },
  "luminance": 0.0502
}

Semantic roles & 50–950 ramp

primary

#183E79

secondary

#AE823F

accent

#A63EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080F

muted

#7A7B7E

Preview Lab

Preview with #183E79

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

Preview Lab → · Contrast checker → · Palette generator →