#183558#183558

#183558 is a dark, moderate cyan. Relative luminance 0.034; OKLCH L 32.6% C 0.072 H 254.5°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#183558
RGB	rgb(24, 53, 88)
HSL	hsl(213, 57%, 22%)
HSV	hsv(213, 73%, 35%)
CMYK	cmyk(72.7%, 39.8%, 0%, 65.5%)
CIE-LAB	lab(21.74, 2.23, -24.30)
CIE-LCH	lch(21.74, 24.40, 275.25°)
OKLab	oklab(32.57% -0.0192 -0.069)
OKLCH	oklch(32.57% 0.072 254.5)
XYZ	xyz(3.4106, 3.4446, 9.7158)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183558 #583B18

analogous

#185558 #183558 #1B1858

triadic

#183558 #581835 #355818

tetradic

#183558 #581855 #583B18 #18581B

square

#183558 #581855 #583B18 #18581B

split-complementary

#183558 #581B18 #555818

monochromatic

#070E18 #0B1828 #183558 #255288 #326FB8

Accessibility & contrast

On white

12.43

#183558 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#183558 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183558

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183558	#FFFFFF	#000000	##FFFFFF
##183558	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#253759

Deuteranopia (green-blind)

#1C3157

Tritanopia (blue-blind)

#003D42

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #183558;
/* rgb */ color: rgb(24, 53, 88);
/* oklch */ color: oklch(32.6% 0.072 254.5);

Tailwind

colors: {
  custom: {
    50: '#5d6b87',
    500: '#183558',
    950: '#000000',
  },
}

SCSS

$custom: #183558;
$custom-light: #5d6b87;
$custom-dark: #000000;

JSON

{
  "hex": "#183558",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 88
  },
  "hsl": {
    "h": 212.813,
    "s": 57.143,
    "l": 21.961
  },
  "oklch": {
    "l": 0.32573,
    "c": 0.07166,
    "h": 254.5
  },
  "luminance": 0.03445
}

Semantic roles & 50–950 ramp

primary

#183558

secondary

#8F6A3D

accent

#9B47E0

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #183558

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

Preview Lab → · Contrast checker → · Palette generator →