#183C73#183C73

#183C73 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.3% C 0.103 H 258.8°. Best body text is #FFFFFF at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#183C73
RGB	rgb(24, 60, 115)
HSL	hsl(216, 65%, 27%)
HSV	hsv(216, 79%, 45%)
CMYK	cmyk(79.1%, 47.8%, 0%, 54.9%)
CIE-LAB	lab(25.75, 8.45, -35.39)
CIE-LCH	lch(25.75, 36.38, 283.42°)
OKLab	oklab(36.25% -0.02 -0.1015)
OKLCH	oklch(36.25% 0.103 258.8)
XYZ	xyz(5.0859, 4.6631, 16.8484)
Luminance	0.0466 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C73 #734F18

analogous

#186A73 #183C73 #221873

triadic

#183C73 #73183C #3C7318

tetradic

#183C73 #73186A #734F18 #187322

square

#183C73 #73186A #734F18 #187322

split-complementary

#183C73 #732218 #6A7318

monochromatic

#050D19 #0D2240 #183C73 #2356A6 #3172D4

Accessibility & contrast

On white

10.87

#183C73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#183C73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C73

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C73	#FFFFFF	#000000	##FFFFFF
##183C73	1.00	10.87	1.93	10.87
#FFFFFF	10.87	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4175

Deuteranopia (green-blind)

#0A3972

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #183c73;
/* rgb */ color: rgb(24, 60, 115);
/* oklch */ color: oklch(36.3% 0.103 258.8);

Tailwind

colors: {
  custom: {
    50: '#63719c',
    500: '#183c73',
    950: '#000000',
  },
}

SCSS

$custom: #183c73;
$custom-light: #63719c;
$custom-dark: #000000;

JSON

{
  "hex": "#183c73",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 115
  },
  "hsl": {
    "h": 216.264,
    "s": 65.468,
    "l": 27.255
  },
  "oklch": {
    "l": 0.36251,
    "c": 0.10342,
    "h": 258.8
  },
  "luminance": 0.04664
}

Semantic roles & 50–950 ramp

primary

#183C73

secondary

#A87E3F

accent

#A63FE8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183C73

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

Preview Lab → · Contrast checker → · Palette generator →