#18578D#18578D

#18578D is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.6% C 0.108 H 249.1°. Best body text is #FFFFFF at 7.54:1 contrast (WCAG AA passes).

Color values

HEX	#18578D
RGB	rgb(24, 87, 141)
HSL	hsl(208, 71%, 32%)
HSV	hsv(208, 83%, 55%)
CMYK	cmyk(83%, 38.3%, 0%, 44.7%)
CIE-LAB	lab(35.85, 0.88, -35.41)
CIE-LCH	lch(35.85, 35.42, 271.42°)
OKLab	oklab(44.64% -0.0386 -0.101)
OKLCH	oklch(44.64% 0.108 249.1)
XYZ	xyz(8.5908, 8.9326, 26.4655)
Luminance	0.0893 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18578D #8D4E18

analogous

#188D88 #18578D #181D8D

triadic

#18578D #8D1857 #578D18

tetradic

#18578D #88188D #8D4E18 #1D8D18

square

#18578D #88188D #8D4E18 #1D8D18

split-complementary

#18578D #8D181D #8D8818

monochromatic

#061624 #0F3759 #18578D #2177C1 #4196DF

Accessibility & contrast

On white

7.54

#18578D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#18578D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18578D

7.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18578D	#FFFFFF	#000000	##FFFFFF
##18578D	1.00	7.54	2.79	7.54
#FFFFFF	7.54	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D5A8F

Deuteranopia (green-blind)

#2B508C

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #18578d;
/* rgb */ color: rgb(24, 87, 141);
/* oklch */ color: oklch(44.6% 0.108 249.1);

Tailwind

colors: {
  custom: {
    50: '#6986ae',
    500: '#18578d',
    950: '#000000',
  },
}

SCSS

$custom: #18578d;
$custom-light: #6986ae;
$custom-dark: #000000;

JSON

{
  "hex": "#18578d",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 141
  },
  "hsl": {
    "h": 207.692,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.44643,
    "c": 0.10814,
    "h": 249.1
  },
  "luminance": 0.08934
}

Semantic roles & 50–950 ramp

primary

#18578D

secondary

#BF7C42

accent

#8D3AEE

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #18578D

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

Preview Lab → · Contrast checker → · Palette generator →