#183B50#183B50

#183B50 is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.7% C 0.055 H 237.8°. Best body text is #FFFFFF at 11.80:1 contrast (WCAG AA passes).

Color values

HEX	#183B50
RGB	rgb(24, 59, 80)
HSL	hsl(203, 54%, 20%)
HSV	hsv(203, 70%, 31%)
CMYK	cmyk(70%, 26.2%, 0%, 68.6%)
CIE-LAB	lab(23.34, -5.02, -16.50)
CIE-LCH	lch(23.34, 17.25, 253.08°)
OKLab	oklab(33.69% -0.0292 -0.0463)
OKLCH	oklch(33.69% 0.055 237.8)
XYZ	xyz(3.3881, 3.9010, 8.1623)
Luminance	0.0390 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B50 #502D18

analogous

#185049 #183B50 #181F50

triadic

#183B50 #50183B #3B5018

tetradic

#183B50 #491850 #502D18 #1F5018

square

#183B50 #491850 #502D18 #1F5018

split-complementary

#183B50 #50181F #504918

monochromatic

#071118 #0A1821 #183B50 #265E7F #3480AE

Accessibility & contrast

On white

11.80

#183B50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#183B50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B50

11.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B50	#FFFFFF	#000000	##FFFFFF
##183B50	1.00	11.80	1.78	11.80
#FFFFFF	11.80	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313B51

Deuteranopia (green-blind)

#2A3550

Tritanopia (blue-blind)

#004042

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183b50;
/* rgb */ color: rgb(24, 59, 80);
/* oklch */ color: oklch(33.7% 0.055 237.8);

Tailwind

colors: {
  custom: {
    50: '#5c7081',
    500: '#183b50',
    950: '#000000',
  },
}

SCSS

$custom: #183b50;
$custom-light: #5c7081;
$custom-dark: #000000;

JSON

{
  "hex": "#183b50",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 80
  },
  "hsl": {
    "h": 202.5,
    "s": 53.846,
    "l": 20.392
  },
  "oklch": {
    "l": 0.33687,
    "c": 0.05474,
    "h": 237.8
  },
  "luminance": 0.03901
}

Semantic roles & 50–950 ramp

primary

#183B50

secondary

#87593D

accent

#824BDD

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183B50

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

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