#183A50#183A50

#183A50 is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.4% C 0.055 H 239.7°. Best body text is #FFFFFF at 11.93:1 contrast (WCAG AA passes).

Color values

HEX	#183A50
RGB	rgb(24, 58, 80)
HSL	hsl(204, 54%, 20%)
HSV	hsv(204, 70%, 31%)
CMYK	cmyk(70%, 27.5%, 0%, 68.6%)
CIE-LAB	lab(23.00, -4.36, -17.04)
CIE-LCH	lch(23.00, 17.59, 255.64°)
OKLab	oklab(33.41% -0.0279 -0.0479)
OKLCH	oklch(33.41% 0.055 239.7)
XYZ	xyz(3.3372, 3.7992, 8.1453)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183A50 #502E18

analogous

#18504A #183A50 #181E50

triadic

#183A50 #50183A #3A5018

tetradic

#183A50 #4A1850 #502E18 #1E5018

square

#183A50 #4A1850 #502E18 #1E5018

split-complementary

#183A50 #50181E #504A18

monochromatic

#071118 #0A1821 #183A50 #265C7F #347EAE

Accessibility & contrast

On white

11.93

#183A50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#183A50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183A50

11.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183A50	#FFFFFF	#000000	##FFFFFF
##183A50	1.00	11.93	1.76	11.93
#FFFFFF	11.93	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303A51

Deuteranopia (green-blind)

#283450

Tritanopia (blue-blind)

#004042

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #183a50;
/* rgb */ color: rgb(24, 58, 80);
/* oklch */ color: oklch(33.4% 0.055 239.7);

Tailwind

colors: {
  custom: {
    50: '#5c7081',
    500: '#183a50',
    950: '#000000',
  },
}

SCSS

$custom: #183a50;
$custom-light: #5c7081;
$custom-dark: #000000;

JSON

{
  "hex": "#183a50",
  "rgb": {
    "r": 24,
    "g": 58,
    "b": 80
  },
  "hsl": {
    "h": 203.571,
    "s": 53.846,
    "l": 20.392
  },
  "oklch": {
    "l": 0.33413,
    "c": 0.05543,
    "h": 239.7
  },
  "luminance": 0.03799
}

Semantic roles & 50–950 ramp

primary

#183A50

secondary

#875A3D

accent

#844BDD

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183A50

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

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