#183F77#183F77

#183F77 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.3% C 0.105 H 258.0°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#183F77
RGB	rgb(24, 63, 119)
HSL	hsl(215, 66%, 28%)
HSV	hsv(215, 80%, 47%)
CMYK	cmyk(79.8%, 47.1%, 0%, 53.3%)
CIE-LAB	lab(26.96, 8.01, -35.98)
CIE-LCH	lch(26.96, 36.86, 282.55°)
OKLab	oklab(37.27% -0.022 -0.1031)
OKLCH	oklch(37.27% 0.105 258)
XYZ	xyz(5.4827, 5.0805, 18.1409)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F77 #775018

analogous

#186F77 #183F77 #201877

triadic

#183F77 #77183F #3F7718

tetradic

#183F77 #77186F #775018 #187720

square

#183F77 #77186F #775018 #187720

split-complementary

#183F77 #772018 #6F7718

monochromatic

#050D19 #0E2444 #183F77 #225AAA #3376D6

Accessibility & contrast

On white

10.42

#183F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#183F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F77

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F77	#FFFFFF	#000000	##FFFFFF
##183F77	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224479

Deuteranopia (green-blind)

#0D3C76

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #183f77;
/* rgb */ color: rgb(24, 63, 119);
/* oklch */ color: oklch(37.3% 0.105 258.0);

Tailwind

colors: {
  custom: {
    50: '#64739f',
    500: '#183f77',
    950: '#000000',
  },
}

SCSS

$custom: #183f77;
$custom-light: #64739f;
$custom-dark: #000000;

JSON

{
  "hex": "#183f77",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 119
  },
  "hsl": {
    "h": 215.368,
    "s": 66.434,
    "l": 28.039
  },
  "oklch": {
    "l": 0.37273,
    "c": 0.10547,
    "h": 258
  },
  "luminance": 0.05081
}

Semantic roles & 50–950 ramp

primary

#183F77

secondary

#AC7F3F

accent

#A33EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #183F77

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

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