#18578B#18578B

#18578B is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.5% C 0.106 H 248.2°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#18578B
RGB	rgb(24, 87, 139)
HSL	hsl(207, 71%, 32%)
HSV	hsv(207, 83%, 55%)
CMYK	cmyk(82.7%, 37.4%, 0%, 45.5%)
CIE-LAB	lab(35.74, 0.08, -34.38)
CIE-LCH	lch(35.74, 34.38, 270.14°)
OKLab	oklab(44.52% -0.0392 -0.098)
OKLCH	oklch(44.52% 0.106 248.2)
XYZ	xyz(8.4433, 8.8736, 25.6889)
Luminance	0.0887 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18578B #8B4C18

analogous

#188B85 #18578B #181E8B

triadic

#18578B #8B1857 #578B18

tetradic

#18578B #85188B #8B4C18 #1E8B18

square

#18578B #85188B #8B4C18 #1E8B18

split-complementary

#18578B #8B181E #8B8518

monochromatic

#061623 #0F3657 #18578B #2178BF #3F96DE

Accessibility & contrast

On white

7.57

#18578B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#18578B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18578B

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18578B	#FFFFFF	#000000	##FFFFFF
##18578B	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5A8D

Deuteranopia (green-blind)

#2D4F8A

Tritanopia (blue-blind)

#00646A

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #18578b;
/* rgb */ color: rgb(24, 87, 139);
/* oklch */ color: oklch(44.5% 0.106 248.2);

Tailwind

colors: {
  custom: {
    50: '#6986ad',
    500: '#18578b',
    950: '#000000',
  },
}

SCSS

$custom: #18578b;
$custom-light: #6986ad;
$custom-dark: #000000;

JSON

{
  "hex": "#18578b",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 139
  },
  "hsl": {
    "h": 207.13,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.44516,
    "c": 0.10551,
    "h": 248.2
  },
  "luminance": 0.08875
}

Semantic roles & 50–950 ramp

primary

#18578B

secondary

#BE7940

accent

#8B3AED

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #18578B

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

Preview Lab → · Contrast checker → · Palette generator →