#18537A#18537A

#18537A is a dark, moderate cyan. Relative luminance 0.078; OKLCH L 42.5% C 0.088 H 242.4°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#18537A
RGB	rgb(24, 83, 122)
HSL	hsl(204, 67%, 29%)
HSV	hsv(204, 80%, 48%)
CMYK	cmyk(80.3%, 32%, 0%, 52.2%)
CIE-LAB	lab(33.53, -4.10, -27.42)
CIE-LCH	lch(33.53, 27.72, 261.50°)
OKLab	oklab(42.47% -0.0406 -0.0777)
OKLCH	oklch(42.47% 0.088 242.4)
XYZ	xyz(6.9814, 7.7850, 19.5433)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18537A #7A3F18

analogous

#187A70 #18537A #18227A

triadic

#18537A #7A1853 #537A18

tetradic

#18537A #70187A #7A3F18 #227A18

square

#18537A #70187A #7A3F18 #227A18

split-complementary

#18537A #7A1822 #7A7018

monochromatic

#05111A #0E3047 #18537A #2276AD #3597D7

Accessibility & contrast

On white

8.21

#18537A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#18537A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18537A

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18537A	#FFFFFF	#000000	##FFFFFF
##18537A	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#41547C

Deuteranopia (green-blind)

#334B79

Tritanopia (blue-blind)

#005D61

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #18537a;
/* rgb */ color: rgb(24, 83, 122);
/* oklch */ color: oklch(42.5% 0.088 242.4);

Tailwind

colors: {
  custom: {
    50: '#6583a0',
    500: '#18537a',
    950: '#000000',
  },
}

SCSS

$custom: #18537a;
$custom-light: #6583a0;
$custom-dark: #000000;

JSON

{
  "hex": "#18537a",
  "rgb": {
    "r": 24,
    "g": 83,
    "b": 122
  },
  "hsl": {
    "h": 203.878,
    "s": 67.123,
    "l": 28.627
  },
  "oklch": {
    "l": 0.4247,
    "c": 0.08766,
    "h": 242.4
  },
  "luminance": 0.07786
}

Semantic roles & 50–950 ramp

primary

#18537A

secondary

#AF6B3F

accent

#823EEA

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#060A0F

muted

#7A7C7E

Preview Lab

Preview with #18537A

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

Preview Lab → · Contrast checker → · Palette generator →