#183B52#183B52

#183B52 is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.8% C 0.057 H 240.3°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#183B52
RGB	rgb(24, 59, 82)
HSL	hsl(204, 55%, 21%)
HSV	hsv(204, 71%, 32%)
CMYK	cmyk(70.7%, 28%, 0%, 67.8%)
CIE-LAB	lab(23.44, -4.25, -17.67)
CIE-LCH	lch(23.44, 18.17, 256.48°)
OKLab	oklab(33.8% -0.0284 -0.0497)
OKLCH	oklch(33.8% 0.057 240.3)
XYZ	xyz(3.4631, 3.9310, 8.5573)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B52 #522F18

analogous

#18524C #183B52 #181E52

triadic

#183B52 #52183B #3B5218

tetradic

#183B52 #4C1852 #522F18 #1E5218

square

#183B52 #4C1852 #522F18 #1E5218

split-complementary

#183B52 #52181E #524C18

monochromatic

#071118 #0A1923 #183B52 #265D81 #347FB1

Accessibility & contrast

On white

11.76

#183B52 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#183B52 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B52

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B52	#FFFFFF	#000000	##FFFFFF
##183B52	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313B53

Deuteranopia (green-blind)

#293552

Tritanopia (blue-blind)

#004143

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #183b52;
/* rgb */ color: rgb(24, 59, 82);
/* oklch */ color: oklch(33.8% 0.057 240.3);

Tailwind

colors: {
  custom: {
    50: '#5c7082',
    500: '#183b52',
    950: '#000000',
  },
}

SCSS

$custom: #183b52;
$custom-light: #5c7082;
$custom-dark: #000000;

JSON

{
  "hex": "#183b52",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 82
  },
  "hsl": {
    "h": 203.793,
    "s": 54.717,
    "l": 20.784
  },
  "oklch": {
    "l": 0.338,
    "c": 0.05722,
    "h": 240.3
  },
  "luminance": 0.03931
}

Semantic roles & 50–950 ramp

primary

#183B52

secondary

#895B3D

accent

#854ADE

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070A

muted

#797A7C

Preview Lab

Preview with #183B52

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

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