#18537E#18537E

#18537E is a dark, moderate cyan. Relative luminance 0.079; OKLCH L 42.7% C 0.093 H 244.9°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#18537E
RGB	rgb(24, 83, 126)
HSL	hsl(205, 68%, 29%)
HSV	hsv(205, 81%, 49%)
CMYK	cmyk(81%, 34.1%, 0%, 50.6%)
CIE-LAB	lab(33.74, -2.52, -29.56)
CIE-LCH	lch(33.74, 29.67, 265.13°)
OKLab	oklab(42.71% -0.0393 -0.0839)
OKLCH	oklch(42.71% 0.093 244.9)
XYZ	xyz(7.2344, 7.8862, 20.8755)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18537E #7E4318

analogous

#187E76 #18537E #18207E

triadic

#18537E #7E1853 #537E18

tetradic

#18537E #76187E #7E4318 #207E18

square

#18537E #76187E #7E4318 #207E18

split-complementary

#18537E #7E1820 #7E7618

monochromatic

#05111A #0E314B #18537E #2275B1 #3795D9

Accessibility & contrast

On white

8.15

#18537E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#18537E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18537E

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18537E	#FFFFFF	#000000	##FFFFFF
##18537E	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5580

Deuteranopia (green-blind)

#314B7D

Tritanopia (blue-blind)

#005D62

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #18537e;
/* rgb */ color: rgb(24, 83, 126);
/* oklch */ color: oklch(42.7% 0.093 244.9);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#18537e",
  "rgb": {
    "r": 24,
    "g": 83,
    "b": 126
  },
  "hsl": {
    "h": 205.294,
    "s": 68,
    "l": 29.412
  },
  "oklch": {
    "l": 0.42709,
    "c": 0.09268,
    "h": 244.9
  },
  "luminance": 0.07887
}

Semantic roles & 50–950 ramp

primary

#18537E

secondary

#B2703F

accent

#863DEB

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #18537E

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

Preview Lab → · Contrast checker → · Palette generator →