#183559#183559

#183559 is a dark, moderate cyan. Relative luminance 0.035; OKLCH L 32.6% C 0.073 H 255.0°. Best body text is #FFFFFF at 12.41:1 contrast (WCAG AA passes).

Color values

HEX	#183559
RGB	rgb(24, 53, 89)
HSL	hsl(213, 58%, 22%)
HSV	hsv(213, 73%, 35%)
CMYK	cmyk(73%, 40.4%, 0%, 65.1%)
CIE-LAB	lab(21.80, 2.64, -24.86)
CIE-LCH	lch(21.80, 25.00, 276.06°)
OKLab	oklab(32.64% -0.0189 -0.0707)
OKLCH	oklch(32.64% 0.073 255)
XYZ	xyz(3.4523, 3.4613, 9.9354)
Luminance	0.0346 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183559 #593C18

analogous

#185659 #183559 #1C1859

triadic

#183559 #591835 #355918

tetradic

#183559 #591856 #593C18 #18591C

square

#183559 #591856 #593C18 #18591C

split-complementary

#183559 #591C18 #565918

monochromatic

#060E18 #0B1829 #183559 #255289 #326EB9

Accessibility & contrast

On white

12.41

#183559 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#183559 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183559

12.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183559	#FFFFFF	#000000	##FFFFFF
##183559	1.00	12.41	1.69	12.41
#FFFFFF	12.41	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25385A

Deuteranopia (green-blind)

#1B3158

Tritanopia (blue-blind)

#003D42

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #183559;
/* rgb */ color: rgb(24, 53, 89);
/* oklch */ color: oklch(32.6% 0.073 255.0);

Tailwind

colors: {
  custom: {
    50: '#5d6b88',
    500: '#183559',
    950: '#000000',
  },
}

SCSS

$custom: #183559;
$custom-light: #5d6b88;
$custom-dark: #000000;

JSON

{
  "hex": "#183559",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 89
  },
  "hsl": {
    "h": 213.231,
    "s": 57.522,
    "l": 22.157
  },
  "oklch": {
    "l": 0.32641,
    "c": 0.07318,
    "h": 255
  },
  "luminance": 0.03462
}

Semantic roles & 50–950 ramp

primary

#183559

secondary

#906B3D

accent

#9C47E1

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #183559

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

Preview Lab → · Contrast checker → · Palette generator →