#181748#181748

#181748 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.1% C 0.089 H 278.3°. Best body text is #FFFFFF at 16.73:1 contrast (WCAG AA passes).

Color values

HEX	#181748
RGB	rgb(24, 23, 72)
HSL	hsl(241, 52%, 19%)
HSV	hsv(241, 68%, 28%)
CMYK	cmyk(66.7%, 68.1%, 0%, 71.8%)
CIE-LAB	lab(11.10, 17.76, -30.55)
CIE-LCH	lch(11.10, 35.33, 300.17°)
OKLab	oklab(24.09% 0.0128 -0.0878)
OKLCH	oklch(24.09% 0.089 278.3)
XYZ	xyz(1.8524, 1.2747, 6.2781)
Luminance	0.0127 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181748 #474817

analogous

#172E48 #181748 #301748

triadic

#181748 #481817 #174818

tetradic

#181748 #48172E #474817 #174830

square

#181748 #48172E #474817 #174830

split-complementary

#181748 #483017 #2E4817

monochromatic

#080717 #09081A #181748 #272676 #3735A5

Accessibility & contrast

On white

16.73

#181748 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#181748 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181748

16.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181748	#FFFFFF	#000000	##FFFFFF
##181748	1.00	16.73	1.25	16.73
#FFFFFF	16.73	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00204A

Deuteranopia (green-blind)

#001C47

Tritanopia (blue-blind)

#00232C

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181748;
/* rgb */ color: rgb(24, 23, 72);
/* oklch */ color: oklch(24.1% 0.089 278.3);

Tailwind

colors: {
  custom: {
    50: '#5b547b',
    500: '#181748',
    950: '#000000',
  },
}

SCSS

$custom: #181748;
$custom-light: #5b547b;
$custom-dark: #000000;

JSON

{
  "hex": "#181748",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 72
  },
  "hsl": {
    "h": 241.224,
    "s": 51.579,
    "l": 18.627
  },
  "oklch": {
    "l": 0.24086,
    "c": 0.08877,
    "h": 278.3
  },
  "luminance": 0.01275
}

Semantic roles & 50–950 ramp

primary

#181748

secondary

#7E7F3C

accent

#DB4DD8

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#040209

muted

#79787B

Preview Lab

Preview with #181748

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

Preview Lab → · Contrast checker → · Palette generator →