#18578C#18578C

#18578C is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.6% C 0.107 H 248.6°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#18578C
RGB	rgb(24, 87, 140)
HSL	hsl(207, 71%, 32%)
HSV	hsv(207, 83%, 55%)
CMYK	cmyk(82.9%, 37.9%, 0%, 45.1%)
CIE-LAB	lab(35.80, 0.48, -34.89)
CIE-LCH	lch(35.80, 34.90, 270.79°)
OKLab	oklab(44.58% -0.0389 -0.0995)
OKLCH	oklch(44.58% 0.107 248.6)
XYZ	xyz(8.5167, 8.9030, 26.0754)
Luminance	0.0890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18578C #8C4D18

analogous

#188C87 #18578C #181D8C

triadic

#18578C #8C1857 #578C18

tetradic

#18578C #87188C #8C4D18 #1D8C18

square

#18578C #87188C #8C4D18 #1D8C18

split-complementary

#18578C #8C181D #8C8718

monochromatic

#061624 #0F3758 #18578C #2177C0 #4096DE

Accessibility & contrast

On white

7.55

#18578C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#18578C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18578C

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18578C	#FFFFFF	#000000	##FFFFFF
##18578C	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5A8E

Deuteranopia (green-blind)

#2C4F8B

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #18578c;
/* rgb */ color: rgb(24, 87, 140);
/* oklch */ color: oklch(44.6% 0.107 248.6);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#18578c",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 140
  },
  "hsl": {
    "h": 207.414,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.44579,
    "c": 0.10682,
    "h": 248.6
  },
  "luminance": 0.08904
}

Semantic roles & 50–950 ramp

primary

#18578C

secondary

#BF7A41

accent

#8C3AED

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #18578C

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

Preview Lab → · Contrast checker → · Palette generator →