#18183E#18183E

#18183E is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.4% C 0.071 H 279.4°. Best body text is #FFFFFF at 16.95:1 contrast (WCAG AA passes).

Color values

HEX	#18183E
RGB	rgb(24, 24, 62)
HSL	hsl(240, 44%, 17%)
HSV	hsv(240, 61%, 24%)
CMYK	cmyk(61.3%, 61.3%, 0%, 75.7%)
CIE-LAB	lab(10.52, 13.09, -24.45)
CIE-LCH	lch(10.52, 27.73, 298.16°)
OKLab	oklab(23.39% 0.0116 -0.0699)
OKLCH	oklch(23.39% 0.071 279.4)
XYZ	xyz(1.5726, 1.1952, 4.7043)
Luminance	0.0120 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18183E #3E3E18

analogous

#182B3E #18183E #2B183E

triadic

#18183E #3E1818 #183E18

tetradic

#18183E #3E182B #3E3E18 #183E2B

square

#18183E #3E182B #3E3E18 #183E2B

split-complementary

#18183E #3E2B18 #2B3E18

monochromatic

#090916 #090916 #18183E #29296A #3A3A96

Accessibility & contrast

On white

16.95

#18183E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#18183E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18183E

16.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18183E	#FFFFFF	#000000	##FFFFFF
##18183E	1.00	16.95	1.24	16.95
#FFFFFF	16.95	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041E3F

Deuteranopia (green-blind)

#011B3D

Tritanopia (blue-blind)

#072128

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #18183e;
/* rgb */ color: rgb(24, 24, 62);
/* oklch */ color: oklch(23.4% 0.071 279.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#18183e",
  "rgb": {
    "r": 24,
    "g": 24,
    "b": 62
  },
  "hsl": {
    "h": 240,
    "s": 44.186,
    "l": 16.863
  },
  "oklch": {
    "l": 0.23385,
    "c": 0.07086,
    "h": 279.4
  },
  "luminance": 0.01195
}

Semantic roles & 50–950 ramp

primary

#18183E

secondary

#74743D

accent

#D454D4

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040208

muted

#79787B

Preview Lab

Preview with #18183E

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

Preview Lab → · Contrast checker → · Palette generator →