#18183C#18183C

#18183C is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.2% C 0.067 H 279.8°. Best body text is #FFFFFF at 17.01:1 contrast (WCAG AA passes).

Color values

HEX	#18183C
RGB	rgb(24, 24, 60)
HSL	hsl(240, 43%, 16%)
HSV	hsv(240, 60%, 24%)
CMYK	cmyk(60%, 60%, 0%, 76.5%)
CIE-LAB	lab(10.36, 12.31, -23.29)
CIE-LCH	lch(10.36, 26.34, 297.86°)
OKLab	oklab(23.21% 0.0115 -0.0665)
OKLCH	oklch(23.21% 0.067 279.8)
XYZ	xyz(1.5187, 1.1736, 4.4206)
Luminance	0.0117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18183C #3C3C18

analogous

#182A3C #18183C #2A183C

triadic

#18183C #3C1818 #183C18

tetradic

#18183C #3C182A #3C3C18 #183C2A

square

#18183C #3C182A #3C3C18 #183C2A

split-complementary

#18183C #3C2A18 #2A3C18

monochromatic

#090916 #090916 #18183C #292968 #3B3B93

Accessibility & contrast

On white

17.01

#18183C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#18183C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18183C

17.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18183C	#FFFFFF	#000000	##FFFFFF
##18183C	1.00	17.01	1.23	17.01
#FFFFFF	17.01	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#061E3D

Deuteranopia (green-blind)

#031B3B

Tritanopia (blue-blind)

#092027

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #18183c;
/* rgb */ color: rgb(24, 24, 60);
/* oklch */ color: oklch(23.2% 0.067 279.8);

Tailwind

colors: {
  custom: {
    50: '#585472',
    500: '#18183c',
    950: '#000000',
  },
}

SCSS

$custom: #18183c;
$custom-light: #585472;
$custom-dark: #000000;

JSON

{
  "hex": "#18183c",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 60
  },
  "hsl": {
    "h": 240,
    "s": 42.857,
    "l": 16.471
  },
  "oklch": {
    "l": 0.23213,
    "c": 0.06746,
    "h": 279.8
  },
  "luminance": 0.01174
}

Semantic roles & 50–950 ramp

primary

#18183C

secondary

#72723E

accent

#D355D3

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030208

muted

#78787B

Preview Lab

Preview with #18183C

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

Preview Lab → · Contrast checker → · Palette generator →