#18537F#18537F

#18537F is a dark, moderate cyan. Relative luminance 0.079; OKLCH L 42.8% C 0.094 H 245.5°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#18537F
RGB	rgb(24, 83, 127)
HSL	hsl(206, 68%, 30%)
HSV	hsv(206, 81%, 50%)
CMYK	cmyk(81.1%, 34.6%, 0%, 50.2%)
CIE-LAB	lab(33.80, -2.12, -30.09)
CIE-LCH	lch(33.80, 30.16, 265.96°)
OKLab	oklab(42.77% -0.0389 -0.0855)
OKLCH	oklch(42.77% 0.094 245.5)
XYZ	xyz(7.2992, 7.9121, 21.2171)
Luminance	0.0791 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18537F #7F4418

analogous

#187F78 #18537F #18207F

triadic

#18537F #7F1853 #537F18

tetradic

#18537F #78187F #7F4418 #207F18

square

#18537F #78187F #7F4418 #207F18

split-complementary

#18537F #7F1820 #7F7818

monochromatic

#05111A #0E314C #18537F #2275B2 #3894D9

Accessibility & contrast

On white

8.13

#18537F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#18537F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18537F

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18537F	#FFFFFF	#000000	##FFFFFF
##18537F	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5581

Deuteranopia (green-blind)

#304B7E

Tritanopia (blue-blind)

#005E63

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #18537f;
/* rgb */ color: rgb(24, 83, 127);
/* oklch */ color: oklch(42.8% 0.094 245.5);

Tailwind

colors: {
  custom: {
    50: '#6683a4',
    500: '#18537f',
    950: '#000000',
  },
}

SCSS

$custom: #18537f;
$custom-light: #6683a4;
$custom-dark: #000000;

JSON

{
  "hex": "#18537f",
  "rgb": {
    "r": 24,
    "g": 83,
    "b": 127
  },
  "hsl": {
    "h": 205.631,
    "s": 68.212,
    "l": 29.608
  },
  "oklch": {
    "l": 0.4277,
    "c": 0.09395,
    "h": 245.5
  },
  "luminance": 0.07913
}

Semantic roles & 50–950 ramp

primary

#18537F

secondary

#B3713F

accent

#873DEB

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #18537F

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

Preview Lab → · Contrast checker → · Palette generator →