#18537D#18537D

#18537D is a dark, moderate cyan. Relative luminance 0.079; OKLCH L 42.6% C 0.091 H 244.3°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#18537D
RGB	rgb(24, 83, 125)
HSL	hsl(205, 68%, 29%)
HSV	hsv(205, 81%, 49%)
CMYK	cmyk(80.8%, 33.6%, 0%, 51%)
CIE-LAB	lab(33.69, -2.92, -29.03)
CIE-LCH	lch(33.69, 29.17, 264.26°)
OKLab	oklab(42.65% -0.0396 -0.0824)
OKLCH	oklch(42.65% 0.091 244.3)
XYZ	xyz(7.1702, 7.8605, 20.5374)
Luminance	0.0786 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18537D #7D4218

analogous

#187D75 #18537D #18217D

triadic

#18537D #7D1853 #537D18

tetradic

#18537D #75187D #7D4218 #217D18

square

#18537D #75187D #7D4218 #217D18

split-complementary

#18537D #7D1821 #7D7518

monochromatic

#05111A #0E314A #18537D #2275B0 #3795D9

Accessibility & contrast

On white

8.16

#18537D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#18537D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18537D

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18537D	#FFFFFF	#000000	##FFFFFF
##18537D	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F547F

Deuteranopia (green-blind)

#314B7C

Tritanopia (blue-blind)

#005D62

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #18537d;
/* rgb */ color: rgb(24, 83, 125);
/* oklch */ color: oklch(42.6% 0.091 244.3);

Tailwind

colors: {
  custom: {
    50: '#6683a3',
    500: '#18537d',
    950: '#000000',
  },
}

SCSS

$custom: #18537d;
$custom-light: #6683a3;
$custom-dark: #000000;

JSON

{
  "hex": "#18537d",
  "rgb": {
    "r": 24,
    "g": 83,
    "b": 125
  },
  "hsl": {
    "h": 204.95,
    "s": 67.785,
    "l": 29.216
  },
  "oklch": {
    "l": 0.42649,
    "c": 0.0914,
    "h": 244.3
  },
  "luminance": 0.07861
}

Semantic roles & 50–950 ramp

primary

#18537D

secondary

#B26F3F

accent

#853DEB

background

#F6F7FA

surface

#EBEEF3

border

#C6C9CD

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #18537D

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

Preview Lab → · Contrast checker → · Palette generator →