#183B56#183B56

#183B56 is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.0% C 0.062 H 244.5°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#183B56
RGB	rgb(24, 59, 86)
HSL	hsl(206, 56%, 22%)
HSV	hsv(206, 72%, 34%)
CMYK	cmyk(72.1%, 31.4%, 0%, 66.3%)
CIE-LAB	lab(23.65, -2.68, -19.98)
CIE-LCH	lch(23.65, 20.16, 262.34°)
OKLab	oklab(34.03% -0.0269 -0.0564)
OKLCH	oklch(34.03% 0.062 244.5)
XYZ	xyz(3.6197, 3.9936, 9.3824)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B56 #563318

analogous

#185652 #183B56 #181C56

triadic

#183B56 #56183B #3B5618

tetradic

#183B56 #521856 #563318 #1C5618

square

#183B56 #521856 #563318 #1C5618

split-complementary

#183B56 #56181C #565218

monochromatic

#071018 #0B1A26 #183B56 #255C86 #337DB6

Accessibility & contrast

On white

11.67

#183B56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#183B56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B56

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B56	#FFFFFF	#000000	##FFFFFF
##183B56	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3C57

Deuteranopia (green-blind)

#263655

Tritanopia (blue-blind)

#004244

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183b56;
/* rgb */ color: rgb(24, 59, 86);
/* oklch */ color: oklch(34.0% 0.062 244.5);

Tailwind

colors: {
  custom: {
    50: '#5d7085',
    500: '#183b56',
    950: '#000000',
  },
}

SCSS

$custom: #183b56;
$custom-light: #5d7085;
$custom-dark: #000000;

JSON

{
  "hex": "#183b56",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 86
  },
  "hsl": {
    "h": 206.129,
    "s": 56.364,
    "l": 21.569
  },
  "oklch": {
    "l": 0.34034,
    "c": 0.06246,
    "h": 244.5
  },
  "luminance": 0.03994
}

Semantic roles & 50–950 ramp

primary

#183B56

secondary

#8D603D

accent

#8A48E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #183B56

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

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