#18558B#18558B

#18558B is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 44.0% C 0.108 H 249.7°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#18558B
RGB	rgb(24, 85, 139)
HSL	hsl(208, 71%, 32%)
HSV	hsv(208, 83%, 55%)
CMYK	cmyk(82.7%, 38.8%, 0%, 45.5%)
CIE-LAB	lab(35.11, 1.37, -35.37)
CIE-LCH	lch(35.11, 35.40, 272.22°)
OKLab	oklab(44.02% -0.0373 -0.1009)
OKLCH	oklch(44.02% 0.108 249.7)
XYZ	xyz(8.2836, 8.5543, 25.6356)
Luminance	0.0856 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18558B #8B4E18

analogous

#188B88 #18558B #181C8B

triadic

#18558B #8B1855 #558B18

tetradic

#18558B #88188B #8B4E18 #1C8B18

square

#18558B #88188B #8B4E18 #1C8B18

split-complementary

#18558B #8B181C #8B8818

monochromatic

#061523 #0F3557 #18558B #2175BF #3F94DE

Accessibility & contrast

On white

7.75

#18558B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#18558B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18558B

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18558B	#FFFFFF	#000000	##FFFFFF
##18558B	1.00	7.75	2.71	7.75
#FFFFFF	7.75	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B588D

Deuteranopia (green-blind)

#2A4E8A

Tritanopia (blue-blind)

#006269

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #18558b;
/* rgb */ color: rgb(24, 85, 139);
/* oklch */ color: oklch(44.0% 0.108 249.7);

Tailwind

colors: {
  custom: {
    50: '#6984ad',
    500: '#18558b',
    950: '#000000',
  },
}

SCSS

$custom: #18558b;
$custom-light: #6984ad;
$custom-dark: #000000;

JSON

{
  "hex": "#18558b",
  "rgb": {
    "r": 24,
    "g": 85,
    "b": 139
  },
  "hsl": {
    "h": 208.174,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.44023,
    "c": 0.10762,
    "h": 249.7
  },
  "luminance": 0.08555
}

Semantic roles & 50–950 ramp

primary

#18558B

secondary

#BE7C40

accent

#8E3AED

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #18558B

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

Preview Lab → · Contrast checker → · Palette generator →