#183E56#183E56

#183E56 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.8% C 0.060 H 239.5°. Best body text is #FFFFFF at 11.28:1 contrast (WCAG AA passes).

Color values

HEX	#183E56
RGB	rgb(24, 62, 86)
HSL	hsl(203, 56%, 22%)
HSV	hsv(203, 72%, 34%)
CMYK	cmyk(72.1%, 27.9%, 0%, 66.3%)
CIE-LAB	lab(24.67, -4.67, -18.38)
CIE-LCH	lch(24.67, 18.96, 255.73°)
OKLab	oklab(34.84% -0.0305 -0.0517)
OKLCH	oklch(34.84% 0.06 239.5)
XYZ	xyz(3.7784, 4.3109, 9.4353)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183E56 #563018

analogous

#18564F #183E56 #181F56

triadic

#183E56 #56183E #3E5618

tetradic

#183E56 #4F1856 #563018 #1F5618

square

#183E56 #4F1856 #563018 #1F5618

split-complementary

#183E56 #56181F #564F18

monochromatic

#071118 #0B1C26 #183E56 #256086 #3383B6

Accessibility & contrast

On white

11.28

#183E56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#183E56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183E56

11.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183E56	#FFFFFF	#000000	##FFFFFF
##183E56	1.00	11.28	1.86	11.28
#FFFFFF	11.28	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333E57

Deuteranopia (green-blind)

#2A3856

Tritanopia (blue-blind)

#004446

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183e56;
/* rgb */ color: rgb(24, 62, 86);
/* oklch */ color: oklch(34.8% 0.060 239.5);

Tailwind

colors: {
  custom: {
    50: '#5d7385',
    500: '#183e56',
    950: '#000000',
  },
}

SCSS

$custom: #183e56;
$custom-light: #5d7385;
$custom-dark: #000000;

JSON

{
  "hex": "#183e56",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 86
  },
  "hsl": {
    "h": 203.226,
    "s": 56.364,
    "l": 21.569
  },
  "oklch": {
    "l": 0.34843,
    "c": 0.06002,
    "h": 239.5
  },
  "luminance": 0.04311
}

Semantic roles & 50–950 ramp

primary

#183E56

secondary

#8D5C3D

accent

#8348E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #183E56

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

Preview Lab → · Contrast checker → · Palette generator →