#183F53#183F53

#183F53 is a dark, muted cyan. Relative luminance 0.044; OKLCH L 34.9% C 0.056 H 233.9°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#183F53
RGB	rgb(24, 63, 83)
HSL	hsl(200, 55%, 21%)
HSV	hsv(200, 71%, 33%)
CMYK	cmyk(71.1%, 24.1%, 0%, 67.5%)
CIE-LAB	lab(24.87, -6.48, -16.11)
CIE-LCH	lch(24.87, 17.36, 248.10°)
OKLab	oklab(34.95% -0.0329 -0.0452)
OKLCH	oklch(34.95% 0.056 233.9)
XYZ	xyz(3.7149, 4.3733, 8.8303)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F53 #532C18

analogous

#185349 #183F53 #182153

triadic

#183F53 #53183F #3F5318

tetradic

#183F53 #491853 #532C18 #215318

square

#183F53 #491853 #532C18 #215318

split-complementary

#183F53 #531821 #534918

monochromatic

#071218 #0A1B24 #183F53 #266382 #3387B2

Accessibility & contrast

On white

11.20

#183F53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#183F53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F53

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F53	#FFFFFF	#000000	##FFFFFF
##183F53	1.00	11.20	1.87	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353E54

Deuteranopia (green-blind)

#2D3853

Tritanopia (blue-blind)

#004446

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183f53;
/* rgb */ color: rgb(24, 63, 83);
/* oklch */ color: oklch(34.9% 0.056 233.9);

Tailwind

colors: {
  custom: {
    50: '#5d7483',
    500: '#183f53',
    950: '#000000',
  },
}

SCSS

$custom: #183f53;
$custom-light: #5d7483;
$custom-dark: #000000;

JSON

{
  "hex": "#183f53",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 83
  },
  "hsl": {
    "h": 200.339,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34949,
    "c": 0.05587,
    "h": 233.9
  },
  "luminance": 0.04374
}

Semantic roles & 50–950 ramp

primary

#183F53

secondary

#8A573D

accent

#7C49DE

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183F53

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

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