#183B76#183B76

#183B76 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.2% C 0.109 H 260.2°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#183B76
RGB	rgb(24, 59, 118)
HSL	hsl(218, 66%, 28%)
HSV	hsv(218, 80%, 46%)
CMYK	cmyk(79.7%, 50%, 0%, 53.7%)
CIE-LAB	lab(25.65, 10.39, -37.45)
CIE-LCH	lch(25.65, 38.87, 285.51°)
OKLab	oklab(36.24% -0.0185 -0.1076)
OKLCH	oklch(36.24% 0.109 260.2)
XYZ	xyz(5.2095, 4.6295, 17.7551)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B76 #765318

analogous

#186A76 #183B76 #241876

triadic

#183B76 #76183B #3B7618

tetradic

#183B76 #76186A #765318 #187624

square

#183B76 #76186A #765318 #187624

split-complementary

#183B76 #762418 #6A7618

monochromatic

#050D19 #0E2243 #183B76 #2254A9 #336FD5

Accessibility & contrast

On white

10.90

#183B76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#183B76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B76

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B76	#FFFFFF	#000000	##FFFFFF
##183B76	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4178

Deuteranopia (green-blind)

#003975

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183b76;
/* rgb */ color: rgb(24, 59, 118);
/* oklch */ color: oklch(36.2% 0.109 260.2);

Tailwind

colors: {
  custom: {
    50: '#64709e',
    500: '#183b76',
    950: '#000000',
  },
}

SCSS

$custom: #183b76;
$custom-light: #64709e;
$custom-dark: #000000;

JSON

{
  "hex": "#183b76",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 118
  },
  "hsl": {
    "h": 217.66,
    "s": 66.197,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36241,
    "c": 0.10916,
    "h": 260.2
  },
  "luminance": 0.0463
}

Semantic roles & 50–950 ramp

primary

#183B76

secondary

#AB833F

accent

#AA3FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183B76

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

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