#18374B#18374B

#18374B is a dark, muted cyan. Relative luminance 0.034; OKLCH L 32.3% C 0.051 H 239.3°. Best body text is #FFFFFF at 12.45:1 contrast (WCAG AA passes).

Color values

HEX	#18374B
RGB	rgb(24, 55, 75)
HSL	hsl(204, 52%, 19%)
HSV	hsv(204, 68%, 29%)
CMYK	cmyk(68%, 26.7%, 0%, 70.6%)
CIE-LAB	lab(21.71, -4.29, -15.71)
CIE-LCH	lch(21.71, 16.29, 254.73°)
OKLab	oklab(32.31% -0.0261 -0.0441)
OKLCH	oklch(32.31% 0.051 239.3)
XYZ	xyz(3.0124, 3.4343, 7.1594)
Luminance	0.0343 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18374B #4B2C18

analogous

#184B46 #18374B #181E4B

triadic

#18374B #4B1837 #374B18

tetradic

#18374B #46184B #4B2C18 #1E4B18

square

#18374B #46184B #4B2C18 #1E4B18

split-complementary

#18374B #4B181E #4B4618

monochromatic

#071117 #09151D #18374B #275979 #367BA8

Accessibility & contrast

On white

12.45

#18374B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#18374B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18374B

12.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18374B	#FFFFFF	#000000	##FFFFFF
##18374B	1.00	12.45	1.69	12.45
#FFFFFF	12.45	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E374C

Deuteranopia (green-blind)

#27324B

Tritanopia (blue-blind)

#003C3E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #18374b;
/* rgb */ color: rgb(24, 55, 75);
/* oklch */ color: oklch(32.3% 0.051 239.3);

Tailwind

colors: {
  custom: {
    50: '#5b6d7d',
    500: '#18374b',
    950: '#000000',
  },
}

SCSS

$custom: #18374b;
$custom-light: #5b6d7d;
$custom-dark: #000000;

JSON

{
  "hex": "#18374b",
  "rgb": {
    "r": 24,
    "g": 55,
    "b": 75
  },
  "hsl": {
    "h": 203.529,
    "s": 51.515,
    "l": 19.412
  },
  "oklch": {
    "l": 0.32308,
    "c": 0.05124,
    "h": 239.3
  },
  "luminance": 0.03435
}

Semantic roles & 50–950 ramp

primary

#18374B

secondary

#82583D

accent

#854DDB

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#040709

muted

#797A7B

Preview Lab

Preview with #18374B

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

Preview Lab → · Contrast checker → · Palette generator →