#183B77#183B77

#183B77 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.3% C 0.111 H 260.4°. Best body text is #FFFFFF at 10.88:1 contrast (WCAG AA passes).

Color values

HEX	#183B77
RGB	rgb(24, 59, 119)
HSL	hsl(218, 66%, 28%)
HSV	hsv(218, 80%, 47%)
CMYK	cmyk(79.8%, 50.4%, 0%, 53.3%)
CIE-LAB	lab(25.72, 10.81, -37.97)
CIE-LCH	lch(25.72, 39.48, 285.89°)
OKLab	oklab(36.32% -0.0184 -0.1091)
OKLCH	oklch(36.32% 0.111 260.4)
XYZ	xyz(5.2692, 4.6534, 18.0697)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B77 #775418

analogous

#186A77 #183B77 #241877

triadic

#183B77 #77183B #3B7718

tetradic

#183B77 #77186A #775418 #187724

square

#183B77 #77186A #775418 #187724

split-complementary

#183B77 #772418 #6A7718

monochromatic

#050D19 #0E2244 #183B77 #2254AA #336FD6

Accessibility & contrast

On white

10.88

#183B77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#183B77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B77

10.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B77	#FFFFFF	#000000	##FFFFFF
##183B77	1.00	10.88	1.93	10.88
#FFFFFF	10.88	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194279

Deuteranopia (green-blind)

#003976

Tritanopia (blue-blind)

#004953

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183b77;
/* rgb */ color: rgb(24, 59, 119);
/* oklch */ color: oklch(36.3% 0.111 260.4);

Tailwind

colors: {
  custom: {
    50: '#64709f',
    500: '#183b77',
    950: '#000000',
  },
}

SCSS

$custom: #183b77;
$custom-light: #64709f;
$custom-dark: #000000;

JSON

{
  "hex": "#183b77",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 119
  },
  "hsl": {
    "h": 217.895,
    "s": 66.434,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36319,
    "c": 0.11063,
    "h": 260.4
  },
  "luminance": 0.04654
}

Semantic roles & 50–950 ramp

primary

#183B77

secondary

#AC843F

accent

#AA3EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183B77

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

Preview Lab → · Contrast checker → · Palette generator →