#181C28#181C28

#181C28 is a very dark, muted blue. Relative luminance 0.012; OKLCH L 22.8% C 0.024 H 270.1°. Best body text is #FFFFFF at 17.00:1 contrast (WCAG AA passes).

Color values

HEX	#181C28
RGB	rgb(24, 28, 40)
HSL	hsl(225, 25%, 13%)
HSV	hsv(225, 40%, 16%)
CMYK	cmyk(40%, 30%, 0%, 84.3%)
CIE-LAB	lab(10.39, 1.84, -8.74)
CIE-LCH	lch(10.39, 8.93, 281.90°)
OKLab	oklab(22.82% 0.0001 -0.0242)
OKLCH	oklch(22.82% 0.024 270.1)
XYZ	xyz(1.1748, 1.1779, 2.1725)
Luminance	0.0118 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C28 #282418

analogous

#182428 #181C28 #1C1828

triadic

#181C28 #28181C #1C2818

tetradic

#181C28 #281824 #282418 #18281C

square

#181C28 #281824 #282418 #18281C

split-complementary

#181C28 #281C18 #242818

monochromatic

#0B0D13 #0B0D13 #181C28 #2F374E #465274

Accessibility & contrast

On white

17.00

#181C28 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#181C28 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C28

17.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C28	#FFFFFF	#000000	##FFFFFF
##181C28	1.00	17.00	1.24	17.00
#FFFFFF	17.00	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	17.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#181D29

Deuteranopia (green-blind)

#171C28

Tritanopia (blue-blind)

#141E20

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #181c28;
/* rgb */ color: rgb(24, 28, 40);
/* oklch */ color: oklch(22.8% 0.024 270.1);

Tailwind

colors: {
  custom: {
    50: '#555761',
    500: '#181c28',
    950: '#000000',
  },
}

SCSS

$custom: #181c28;
$custom-light: #555761;
$custom-dark: #000000;

JSON

{
  "hex": "#181c28",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 40
  },
  "hsl": {
    "h": 225,
    "s": 25,
    "l": 12.549
  },
  "oklch": {
    "l": 0.22816,
    "c": 0.02416,
    "h": 270.1
  },
  "luminance": 0.01178
}

Semantic roles & 50–950 ramp

primary

#181C28

secondary

#5C5540

accent

#AB66C1

background

#F4F5F5

surface

#E8E9EA

border

#C4C5C6

text

#030305

muted

#787879

Preview Lab

Preview with #181C28

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

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