#183B73#183B73

#183B73 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.0% C 0.105 H 259.5°. Best body text is #FFFFFF at 10.98:1 contrast (WCAG AA passes).

Color values

HEX	#183B73
RGB	rgb(24, 59, 115)
HSL	hsl(217, 65%, 27%)
HSV	hsv(217, 79%, 45%)
CMYK	cmyk(79.1%, 48.7%, 0%, 54.9%)
CIE-LAB	lab(25.44, 9.15, -35.89)
CIE-LCH	lch(25.44, 37.03, 284.30°)
OKLab	oklab(36.01% -0.0191 -0.103)
OKLCH	oklch(36.01% 0.105 259.5)
XYZ	xyz(5.0340, 4.5594, 16.8311)
Luminance	0.0456 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B73 #735018

analogous

#186973 #183B73 #221873

triadic

#183B73 #73183B #3B7318

tetradic

#183B73 #731869 #735018 #187322

square

#183B73 #731869 #735018 #187322

split-complementary

#183B73 #732218 #697318

monochromatic

#050D19 #0D2140 #183B73 #2355A6 #3170D4

Accessibility & contrast

On white

10.98

#183B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B73

10.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B73	#FFFFFF	#000000	##FFFFFF
##183B73	1.00	10.98	1.91	10.98
#FFFFFF	10.98	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4175

Deuteranopia (green-blind)

#063872

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183b73;
/* rgb */ color: rgb(24, 59, 115);
/* oklch */ color: oklch(36.0% 0.105 259.5);

Tailwind

colors: {
  custom: {
    50: '#63709c',
    500: '#183b73',
    950: '#000000',
  },
}

SCSS

$custom: #183b73;
$custom-light: #63709c;
$custom-dark: #000000;

JSON

{
  "hex": "#183b73",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 115
  },
  "hsl": {
    "h": 216.923,
    "s": 65.468,
    "l": 27.255
  },
  "oklch": {
    "l": 0.3601,
    "c": 0.10471,
    "h": 259.5
  },
  "luminance": 0.0456
}

Semantic roles & 50–950 ramp

primary

#183B73

secondary

#A8803F

accent

#A73FE8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183B73

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

Preview Lab → · Contrast checker → · Palette generator →