#181C3A#181C3A

#181C3A is a very dark, muted blue. Relative luminance 0.013; OKLCH L 24.0% C 0.057 H 275.5°. Best body text is #FFFFFF at 16.59:1 contrast (WCAG AA passes).

Color values

HEX	#181C3A
RGB	rgb(24, 28, 58)
HSL	hsl(233, 41%, 16%)
HSV	hsv(233, 59%, 23%)
CMYK	cmyk(58.6%, 51.7%, 0%, 77.3%)
CIE-LAB	lab(11.48, 8.47, -20.07)
CIE-LCH	lch(11.48, 21.78, 292.90°)
OKLab	oklab(24.01% 0.0055 -0.057)
OKLCH	oklch(24.01% 0.057 275.5)
XYZ	xyz(1.5554, 1.3301, 4.1769)
Luminance	0.0133 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C3A #3A3618

analogous

#182D3A #181C3A #25183A

triadic

#181C3A #3A181C #1C3A18

tetradic

#181C3A #3A182D #3A3618 #183A25

square

#181C3A #3A182D #3A3618 #183A25

split-complementary

#181C3A #3A2518 #2D3A18

monochromatic

#090A16 #090A16 #181C3A #2A3165 #3C4691

Accessibility & contrast

On white

16.59

#181C3A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181C3A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C3A

16.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C3A	#FFFFFF	#000000	##FFFFFF
##181C3A	1.00	16.59	1.27	16.59
#FFFFFF	16.59	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F203B

Deuteranopia (green-blind)

#0C1D39

Tritanopia (blue-blind)

#0A2228

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181c3a;
/* rgb */ color: rgb(24, 28, 58);
/* oklch */ color: oklch(24.0% 0.057 275.5);

Tailwind

colors: {
  custom: {
    50: '#585770',
    500: '#181c3a',
    950: '#000000',
  },
}

SCSS

$custom: #181c3a;
$custom-light: #585770;
$custom-dark: #000000;

JSON

{
  "hex": "#181c3a",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 58
  },
  "hsl": {
    "h": 232.941,
    "s": 41.463,
    "l": 16.078
  },
  "oklch": {
    "l": 0.24014,
    "c": 0.05724,
    "h": 275.5
  },
  "luminance": 0.0133
}

Semantic roles & 50–950 ramp

primary

#181C3A

secondary

#706A3E

accent

#C357D1

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #181C3A

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

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