#181B38#181B38

#181B38 is a very dark, muted blue. Relative luminance 0.013; OKLCH L 23.6% C 0.055 H 276.8°. Best body text is #FFFFFF at 16.76:1 contrast (WCAG AA passes).

Color values

HEX	#181B38
RGB	rgb(24, 27, 56)
HSL	hsl(234, 40%, 16%)
HSV	hsv(234, 57%, 22%)
CMYK	cmyk(57.1%, 51.8%, 0%, 78%)
CIE-LAB	lab(11.02, 8.46, -19.38)
CIE-LCH	lch(11.02, 21.15, 293.59°)
OKLab	oklab(23.61% 0.0066 -0.055)
OKLCH	oklch(23.61% 0.055 276.8)
XYZ	xyz(1.4822, 1.2635, 3.9064)
Luminance	0.0126 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B38 #383518

analogous

#182B38 #181B38 #251838

triadic

#181B38 #38181B #1B3818

tetradic

#181B38 #38182B #383518 #183825

square

#181B38 #38182B #383518 #183825

split-complementary

#181B38 #382518 #2B3818

monochromatic

#090A15 #090A15 #181B38 #2A3063 #3D448E

Accessibility & contrast

On white

16.76

#181B38 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#181B38 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B38

16.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B38	#FFFFFF	#000000	##FFFFFF
##181B38	1.00	16.76	1.25	16.76
#FFFFFF	16.76	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F1F39

Deuteranopia (green-blind)

#0C1C37

Tritanopia (blue-blind)

#0C2126

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181b38;
/* rgb */ color: rgb(24, 27, 56);
/* oklch */ color: oklch(23.6% 0.055 276.8);

Tailwind

colors: {
  custom: {
    50: '#57576f',
    500: '#181b38',
    950: '#000000',
  },
}

SCSS

$custom: #181b38;
$custom-light: #57576f;
$custom-dark: #000000;

JSON

{
  "hex": "#181b38",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 56
  },
  "hsl": {
    "h": 234.375,
    "s": 40,
    "l": 15.686
  },
  "oklch": {
    "l": 0.23613,
    "c": 0.05537,
    "h": 276.8
  },
  "luminance": 0.01264
}

Semantic roles & 50–950 ramp

primary

#181B38

secondary

#6E693E

accent

#C558D0

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #181B38

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

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