#18173D#18173D

#18173D is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.1% C 0.071 H 280.5°. Best body text is #FFFFFF at 17.09:1 contrast (WCAG AA passes).

Color values

HEX	#18173D
RGB	rgb(24, 23, 61)
HSL	hsl(242, 45%, 16%)
HSV	hsv(242, 62%, 24%)
CMYK	cmyk(60.7%, 62.3%, 0%, 76.1%)
CIE-LAB	lab(10.14, 13.46, -24.36)
CIE-LCH	lch(10.14, 27.83, 298.91°)
OKLab	oklab(23.07% 0.0129 -0.0696)
OKLCH	oklch(23.07% 0.071 280.5)
XYZ	xyz(1.5251, 1.1438, 4.5544)
Luminance	0.0114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18173D #3C3D17

analogous

#17293D #18173D #2B173D

triadic

#18173D #3D1817 #173D18

tetradic

#18173D #3D1729 #3C3D17 #173D2B

square

#18173D #3D1729 #3C3D17 #173D2B

split-complementary

#18173D #3D2B17 #293D17

monochromatic

#090816 #090816 #18173D #292869 #3B3996

Accessibility & contrast

On white

17.09

#18173D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#18173D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18173D

17.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18173D	#FFFFFF	#000000	##FFFFFF
##18173D	1.00	17.09	1.23	17.09
#FFFFFF	17.09	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031D3E

Deuteranopia (green-blind)

#001A3C

Tritanopia (blue-blind)

#082027

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #18173d;
/* rgb */ color: rgb(24, 23, 61);
/* oklch */ color: oklch(23.1% 0.071 280.5);

Tailwind

colors: {
  custom: {
    50: '#595373',
    500: '#18173d',
    950: '#000000',
  },
}

SCSS

$custom: #18173d;
$custom-light: #595373;
$custom-dark: #000000;

JSON

{
  "hex": "#18173d",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 61
  },
  "hsl": {
    "h": 241.579,
    "s": 45.238,
    "l": 16.471
  },
  "oklch": {
    "l": 0.23071,
    "c": 0.07083,
    "h": 280.5
  },
  "luminance": 0.01144
}

Semantic roles & 50–950 ramp

primary

#18173D

secondary

#72743C

accent

#D553D2

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #18173D

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

Preview Lab → · Contrast checker → · Palette generator →