#18374C#18374C

#18374C is a dark, muted cyan. Relative luminance 0.034; OKLCH L 32.4% C 0.053 H 240.7°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#18374C
RGB	rgb(24, 55, 76)
HSL	hsl(204, 52%, 20%)
HSV	hsv(204, 68%, 30%)
CMYK	cmyk(68.4%, 27.6%, 0%, 70.2%)
CIE-LAB	lab(21.76, -3.91, -16.30)
CIE-LCH	lch(21.76, 16.77, 256.52°)
OKLab	oklab(32.36% -0.0257 -0.0458)
OKLCH	oklch(32.36% 0.053 240.7)
XYZ	xyz(3.0469, 3.4481, 7.3410)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18374C #4C2D18

analogous

#184C47 #18374C #181D4C

triadic

#18374C #4C1837 #374C18

tetradic

#18374C #47184C #4C2D18 #1D4C18

square

#18374C #47184C #4C2D18 #1D4C18

split-complementary

#18374C #4C181D #4C4718

monochromatic

#071117 #09151D #18374C #27597B #357AA9

Accessibility & contrast

On white

12.43

#18374C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#18374C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18374C

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18374C	#FFFFFF	#000000	##FFFFFF
##18374C	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E374D

Deuteranopia (green-blind)

#26324C

Tritanopia (blue-blind)

#003C3E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #18374c;
/* rgb */ color: rgb(24, 55, 76);
/* oklch */ color: oklch(32.4% 0.053 240.7);

Tailwind

colors: {
  custom: {
    50: '#5b6d7e',
    500: '#18374c',
    950: '#000000',
  },
}

SCSS

$custom: #18374c;
$custom-light: #5b6d7e;
$custom-dark: #000000;

JSON

{
  "hex": "#18374c",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 76
  },
  "hsl": {
    "h": 204.231,
    "s": 52,
    "l": 19.608
  },
  "oklch": {
    "l": 0.32364,
    "c": 0.05252,
    "h": 240.7
  },
  "luminance": 0.03448
}

Semantic roles & 50–950 ramp

primary

#18374C

secondary

#83593D

accent

#864CDB

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #18374C

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

Preview Lab → · Contrast checker → · Palette generator →