#181C3C#181C3C

#181C3C is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.2% C 0.061 H 275.5°. Best body text is #FFFFFF at 16.53:1 contrast (WCAG AA passes).

Color values

HEX	#181C3C
RGB	rgb(24, 28, 60)
HSL	hsl(233, 43%, 16%)
HSV	hsv(233, 60%, 24%)
CMYK	cmyk(60%, 53.3%, 0%, 76.5%)
CIE-LAB	lab(11.63, 9.26, -21.26)
CIE-LCH	lch(11.63, 23.19, 293.54°)
OKLab	oklab(24.17% 0.0059 -0.0605)
OKLCH	oklch(24.17% 0.061 275.5)
XYZ	xyz(1.6073, 1.3508, 4.4501)
Luminance	0.0135 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181C3C #3C3818

analogous

#182E3C #181C3C #26183C

triadic

#181C3C #3C181C #1C3C18

tetradic

#181C3C #3C182E #3C3818 #183C26

square

#181C3C #3C182E #3C3818 #183C26

split-complementary

#181C3C #3C2618 #2E3C18

monochromatic

#090A16 #090A16 #181C3C #293068 #3B4593

Accessibility & contrast

On white

16.53

#181C3C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#181C3C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181C3C

16.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181C3C	#FFFFFF	#000000	##FFFFFF
##181C3C	1.00	16.53	1.27	16.53
#FFFFFF	16.53	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E203D

Deuteranopia (green-blind)

#0A1D3B

Tritanopia (blue-blind)

#082329

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #181c3c;
/* rgb */ color: rgb(24, 28, 60);
/* oklch */ color: oklch(24.2% 0.061 275.5);

Tailwind

colors: {
  custom: {
    50: '#585772',
    500: '#181c3c',
    950: '#000000',
  },
}

SCSS

$custom: #181c3c;
$custom-light: #585772;
$custom-dark: #000000;

JSON

{
  "hex": "#181c3c",
  "rgb": {
    "r": 24,
    "g": 28,
    "b": 60
  },
  "hsl": {
    "h": 233.333,
    "s": 42.857,
    "l": 16.471
  },
  "oklch": {
    "l": 0.24168,
    "c": 0.06076,
    "h": 275.5
  },
  "luminance": 0.01351
}

Semantic roles & 50–950 ramp

primary

#181C3C

secondary

#726C3E

accent

#C555D3

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #181C3C

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

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