#183B72#183B72

#183B72 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.9% C 0.103 H 259.2°. Best body text is #FFFFFF at 11.01:1 contrast (WCAG AA passes).

Color values

HEX	#183B72
RGB	rgb(24, 59, 114)
HSL	hsl(217, 65%, 27%)
HSV	hsv(217, 79%, 45%)
CMYK	cmyk(78.9%, 48.2%, 0%, 55.3%)
CIE-LAB	lab(25.37, 8.73, -35.36)
CIE-LCH	lch(25.37, 36.42, 283.87°)
OKLab	oklab(35.94% -0.0193 -0.1014)
OKLCH	oklch(35.94% 0.103 259.2)
XYZ	xyz(4.9768, 4.5365, 16.5297)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B72 #724F18

analogous

#186872 #183B72 #221872

triadic

#183B72 #72183B #3B7218

tetradic

#183B72 #721868 #724F18 #187222

square

#183B72 #721868 #724F18 #187222

split-complementary

#183B72 #722218 #687218

monochromatic

#050D19 #0D213F #183B72 #2355A5 #3170D4

Accessibility & contrast

On white

11.01

#183B72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#183B72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B72

11.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B72	#FFFFFF	#000000	##FFFFFF
##183B72	1.00	11.01	1.91	11.01
#FFFFFF	11.01	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4174

Deuteranopia (green-blind)

#093871

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183b72;
/* rgb */ color: rgb(24, 59, 114);
/* oklch */ color: oklch(35.9% 0.103 259.2);

Tailwind

colors: {
  custom: {
    50: '#63709b',
    500: '#183b72',
    950: '#000000',
  },
}

SCSS

$custom: #183b72;
$custom-light: #63709b;
$custom-dark: #000000;

JSON

{
  "hex": "#183b72",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 114
  },
  "hsl": {
    "h": 216.667,
    "s": 65.217,
    "l": 27.059
  },
  "oklch": {
    "l": 0.35935,
    "c": 0.10323,
    "h": 259.2
  },
  "luminance": 0.04537
}

Semantic roles & 50–950 ramp

primary

#183B72

secondary

#A77F3E

accent

#A740E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #183B72

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

Preview Lab → · Contrast checker → · Palette generator →