#183D53#183D53

#183D53 is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.4% C 0.057 H 237.8°. Best body text is #FFFFFF at 11.47:1 contrast (WCAG AA passes).

Color values

HEX	#183D53
RGB	rgb(24, 61, 83)
HSL	hsl(202, 55%, 21%)
HSV	hsv(202, 71%, 33%)
CMYK	cmyk(71.1%, 26.5%, 0%, 67.5%)
CIE-LAB	lab(24.18, -5.18, -17.18)
CIE-LCH	lch(24.18, 17.94, 253.23°)
OKLab	oklab(34.4% -0.0304 -0.0482)
OKLCH	oklch(34.4% 0.057 237.8)
XYZ	xyz(3.6062, 4.1558, 8.7940)
Luminance	0.0416 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D53 #532E18

analogous

#18534B #183D53 #181F53

triadic

#183D53 #53183D #3D5318

tetradic

#183D53 #4B1853 #532E18 #1F5318

square

#183D53 #4B1853 #532E18 #1F5318

split-complementary

#183D53 #53181F #534B18

monochromatic

#071118 #0A1A24 #183D53 #266082 #3383B2

Accessibility & contrast

On white

11.47

#183D53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183D53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D53

11.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D53	#FFFFFF	#000000	##FFFFFF
##183D53	1.00	11.47	1.83	11.47
#FFFFFF	11.47	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333D54

Deuteranopia (green-blind)

#2B3753

Tritanopia (blue-blind)

#004344

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #183d53;
/* rgb */ color: rgb(24, 61, 83);
/* oklch */ color: oklch(34.4% 0.057 237.8);

Tailwind

colors: {
  custom: {
    50: '#5c7283',
    500: '#183d53',
    950: '#000000',
  },
}

SCSS

$custom: #183d53;
$custom-light: #5c7283;
$custom-dark: #000000;

JSON

{
  "hex": "#183d53",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 83
  },
  "hsl": {
    "h": 202.373,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34402,
    "c": 0.05705,
    "h": 237.8
  },
  "luminance": 0.04156
}

Semantic roles & 50–950 ramp

primary

#183D53

secondary

#8A5A3D

accent

#8149DE

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080A

muted

#797B7C

Preview Lab

Preview with #183D53

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

Preview Lab → · Contrast checker → · Palette generator →