#18577D#18577D

#18577D is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 43.7% C 0.088 H 240.3°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#18577D
RGB	rgb(24, 87, 125)
HSL	hsl(203, 68%, 29%)
HSV	hsv(203, 81%, 49%)
CMYK	cmyk(80.8%, 30.4%, 0%, 51%)
CIE-LAB	lab(34.98, -5.44, -26.99)
CIE-LCH	lch(34.98, 27.53, 258.60°)
OKLab	oklab(43.67% -0.0436 -0.0764)
OKLCH	oklch(43.67% 0.088 240.3)
XYZ	xyz(7.4851, 8.4903, 20.6424)
Luminance	0.0849 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18577D #7D3E18

analogous

#187D71 #18577D #18257D

triadic

#18577D #7D1857 #577D18

tetradic

#18577D #71187D #7D3E18 #257D18

square

#18577D #71187D #7D3E18 #257D18

split-complementary

#18577D #7D1825 #7D7118

monochromatic

#05121A #0E334A #18577D #227BB0 #379CD9

Accessibility & contrast

On white

7.78

#18577D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#18577D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18577D

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18577D	#FFFFFF	#000000	##FFFFFF
##18577D	1.00	7.78	2.70	7.78
#FFFFFF	7.78	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#45577F

Deuteranopia (green-blind)

#374E7C

Tritanopia (blue-blind)

#006164

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #18577d;
/* rgb */ color: rgb(24, 87, 125);
/* oklch */ color: oklch(43.7% 0.088 240.3);

Tailwind

colors: {
  custom: {
    50: '#6686a3',
    500: '#18577d',
    950: '#000000',
  },
}

SCSS

$custom: #18577d;
$custom-light: #6686a3;
$custom-dark: #000000;

JSON

{
  "hex": "#18577d",
  "rgb": {
    "r": 24,
    "g": 87,
    "b": 125
  },
  "hsl": {
    "h": 202.574,
    "s": 67.785,
    "l": 29.216
  },
  "oklch": {
    "l": 0.43672,
    "c": 0.08796,
    "h": 240.3
  },
  "luminance": 0.08491
}

Semantic roles & 50–950 ramp

primary

#18577D

secondary

#B26A3F

accent

#7E3DEB

background

#F6F8FA

surface

#EBEFF3

border

#C6CACD

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #18577D

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

Preview Lab → · Contrast checker → · Palette generator →