#183C74#183C74

#183C74 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.3% C 0.105 H 259.1°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#183C74
RGB	rgb(24, 60, 116)
HSL	hsl(217, 66%, 27%)
HSV	hsv(217, 79%, 45%)
CMYK	cmyk(79.3%, 48.3%, 0%, 54.5%)
CIE-LAB	lab(25.82, 8.86, -35.91)
CIE-LCH	lch(25.82, 36.99, 283.86°)
OKLab	oklab(36.33% -0.0198 -0.103)
OKLCH	oklch(36.33% 0.105 259.1)
XYZ	xyz(5.1438, 4.6863, 17.1531)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C74 #745018

analogous

#186A74 #183C74 #221874

triadic

#183C74 #74183C #3C7418

tetradic

#183C74 #74186A #745018 #187422

square

#183C74 #74186A #745018 #187422

split-complementary

#183C74 #742218 #6A7418

monochromatic

#050D19 #0E2241 #183C74 #2256A7 #3272D5

Accessibility & contrast

On white

10.84

#183C74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#183C74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C74

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C74	#FFFFFF	#000000	##FFFFFF
##183C74	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4276

Deuteranopia (green-blind)

#083973

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183c74;
/* rgb */ color: rgb(24, 60, 116);
/* oklch */ color: oklch(36.3% 0.105 259.1);

Tailwind

colors: {
  custom: {
    50: '#64719c',
    500: '#183c74',
    950: '#000000',
  },
}

SCSS

$custom: #183c74;
$custom-light: #64719c;
$custom-dark: #000000;

JSON

{
  "hex": "#183c74",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 116
  },
  "hsl": {
    "h": 216.522,
    "s": 65.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36326,
    "c": 0.1049,
    "h": 259.1
  },
  "luminance": 0.04687
}

Semantic roles & 50–950 ramp

primary

#183C74

secondary

#A97F3F

accent

#A63FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183C74

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

Preview Lab → · Contrast checker → · Palette generator →