#181738#181738

#181738 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.6% C 0.062 H 281.6°. Best body text is #FFFFFF at 17.23:1 contrast (WCAG AA passes).

Color values

HEX	#181738
RGB	rgb(24, 23, 56)
HSL	hsl(242, 42%, 15%)
HSV	hsv(242, 59%, 22%)
CMYK	cmyk(57.1%, 58.9%, 0%, 78%)
CIE-LAB	lab(9.74, 11.53, -21.43)
CIE-LCH	lch(9.74, 24.33, 298.28°)
OKLab	oklab(22.65% 0.0125 -0.061)
OKLCH	oklch(22.65% 0.062 281.6)
XYZ	xyz(1.3967, 1.0924, 3.8779)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.46

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181738 #373817

analogous

#172638 #181738 #281738

triadic

#181738 #381817 #173818

tetradic

#181738 #381726 #373817 #173828

square

#181738 #381726 #373817 #173828

split-complementary

#181738 #382817 #263817

monochromatic

#090916 #090916 #181738 #2B2963 #3D3B8F

Accessibility & contrast

On white

17.23

#181738 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#181738 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181738

17.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181738	#FFFFFF	#000000	##FFFFFF
##181738	1.00	17.23	1.22	17.23
#FFFFFF	17.23	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#081C39

Deuteranopia (green-blind)

#061A37

Tritanopia (blue-blind)

#0C1E24

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #181738;
/* rgb */ color: rgb(24, 23, 56);
/* oklch */ color: oklch(22.6% 0.062 281.6);

Tailwind

colors: {
  custom: {
    50: '#58536f',
    500: '#181738',
    950: '#000000',
  },
}

SCSS

$custom: #181738;
$custom-light: #58536f;
$custom-dark: #000000;

JSON

{
  "hex": "#181738",
  "rgb": {
    "r": 24,
    "g": 23,
    "b": 56
  },
  "hsl": {
    "h": 241.818,
    "s": 41.772,
    "l": 15.49
  },
  "oklch": {
    "l": 0.22646,
    "c": 0.06228,
    "h": 281.6
  },
  "luminance": 0.01093
}

Semantic roles & 50–950 ramp

primary

#181738

secondary

#6D6E3C

accent

#D256CE

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #181738

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

Preview Lab → · Contrast checker → · Palette generator →