#18578F#18578F

#18578F is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.8% C 0.111 H 249.9°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#18578F
RGB	rgb(24, 87, 143)
HSL	hsl(208, 71%, 33%)
HSV	hsv(208, 83%, 56%)
CMYK	cmyk(83.2%, 39.2%, 0%, 43.9%)
CIE-LAB	lab(35.97, 1.68, -36.44)
CIE-LCH	lch(35.97, 36.48, 272.64°)
OKLab	oklab(44.77% -0.0381 -0.104)
OKLCH	oklch(44.77% 0.111 249.9)
XYZ	xyz(8.7409, 8.9927, 27.2563)
Luminance	0.0899 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18578F #8F5018

analogous

#188F8B #18578F #181C8F

triadic

#18578F #8F1857 #578F18

tetradic

#18578F #8B188F #8F5018 #1C8F18

square

#18578F #8B188F #8F5018 #1C8F18

split-complementary

#18578F #8F181C #8F8B18

monochromatic

#061726 #0F375B #18578F #2177C3 #4295DF

Accessibility & contrast

On white

7.50

#18578F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#18578F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18578F

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18578F	#FFFFFF	#000000	##FFFFFF
##18578F	1.00	7.50	2.80	7.50
#FFFFFF	7.50	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C5A91

Deuteranopia (green-blind)

#2A508E

Tritanopia (blue-blind)

#00646C

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #18578f;
/* rgb */ color: rgb(24, 87, 143);
/* oklch */ color: oklch(44.8% 0.111 249.9);

Tailwind

colors: {
  custom: {
    50: '#6a86b0',
    500: '#18578f',
    950: '#000000',
  },
}

SCSS

$custom: #18578f;
$custom-light: #6a86b0;
$custom-dark: #000000;

JSON

{
  "hex": "#18578f",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 143
  },
  "hsl": {
    "h": 208.235,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.44772,
    "c": 0.11077,
    "h": 249.9
  },
  "luminance": 0.08994
}

Semantic roles & 50–950 ramp

primary

#18578F

secondary

#C07E43

accent

#8F3AEE

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #18578F

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

Preview Lab → · Contrast checker → · Palette generator →