#18183D#18183D

#18183D is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.3% C 0.069 H 279.6°. Best body text is #FFFFFF at 16.98:1 contrast (WCAG AA passes).

Color values

HEX	#18183D
RGB	rgb(24, 24, 61)
HSL	hsl(240, 44%, 17%)
HSV	hsv(240, 61%, 24%)
CMYK	cmyk(60.7%, 60.7%, 0%, 76.1%)
CIE-LAB	lab(10.44, 12.70, -23.87)
CIE-LCH	lch(10.44, 27.04, 298.01°)
OKLab	oklab(23.3% 0.0115 -0.0682)
OKLCH	oklch(23.3% 0.069 279.6)
XYZ	xyz(1.5454, 1.1843, 4.5611)
Luminance	0.0118 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18183D #3D3D18

analogous

#182B3D #18183D #2B183D

triadic

#18183D #3D1818 #183D18

tetradic

#18183D #3D182B #3D3D18 #183D2B

square

#18183D #3D182B #3D3D18 #183D2B

split-complementary

#18183D #3D2B18 #2B3D18

monochromatic

#090916 #090916 #18183D #292969 #3B3B95

Accessibility & contrast

On white

16.98

#18183D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#18183D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18183D

16.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18183D	#FFFFFF	#000000	##FFFFFF
##18183D	1.00	16.98	1.24	16.98
#FFFFFF	16.98	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051E3E

Deuteranopia (green-blind)

#021B3C

Tritanopia (blue-blind)

#082027

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #18183d;
/* rgb */ color: rgb(24, 24, 61);
/* oklch */ color: oklch(23.3% 0.069 279.6);

Tailwind

colors: {
  custom: {
    50: '#595473',
    500: '#18183d',
    950: '#000000',
  },
}

SCSS

$custom: #18183d;
$custom-light: #595473;
$custom-dark: #000000;

JSON

{
  "hex": "#18183d",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 61
  },
  "hsl": {
    "h": 240,
    "s": 43.529,
    "l": 16.667
  },
  "oklch": {
    "l": 0.23298,
    "c": 0.06917,
    "h": 279.6
  },
  "luminance": 0.01184
}

Semantic roles & 50–950 ramp

primary

#18183D

secondary

#73733D

accent

#D355D3

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #18183D

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

Preview Lab → · Contrast checker → · Palette generator →