#183D54#183D54

#183D54 is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.5% C 0.058 H 239.0°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#183D54
RGB	rgb(24, 61, 84)
HSL	hsl(203, 56%, 21%)
HSV	hsv(203, 71%, 33%)
CMYK	cmyk(71.4%, 27.4%, 0%, 67.1%)
CIE-LAB	lab(24.23, -4.79, -17.75)
CIE-LCH	lch(24.23, 18.39, 254.90°)
OKLab	oklab(34.46% -0.03 -0.0499)
OKLCH	oklch(34.46% 0.058 239)
XYZ	xyz(3.6451, 4.1714, 8.9988)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183D54 #542F18

analogous

#18544D #183D54 #181F54

triadic

#183D54 #54183D #3D5418

tetradic

#183D54 #4D1854 #542F18 #1F5418

square

#183D54 #4D1854 #542F18 #1F5418

split-complementary

#183D54 #54181F #544D18

monochromatic

#071118 #0A1A24 #183D54 #266084 #3382B3

Accessibility & contrast

On white

11.45

#183D54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#183D54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183D54

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183D54	#FFFFFF	#000000	##FFFFFF
##183D54	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323D55

Deuteranopia (green-blind)

#2A3754

Tritanopia (blue-blind)

#004345

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #183d54;
/* rgb */ color: rgb(24, 61, 84);
/* oklch */ color: oklch(34.5% 0.058 239.0);

Tailwind

colors: {
  custom: {
    50: '#5d7284',
    500: '#183d54',
    950: '#000000',
  },
}

SCSS

$custom: #183d54;
$custom-light: #5d7284;
$custom-dark: #000000;

JSON

{
  "hex": "#183d54",
  "rgb": {
    "r": 24,
    "g": 61,
    "b": 84
  },
  "hsl": {
    "h": 203,
    "s": 55.556,
    "l": 21.176
  },
  "oklch": {
    "l": 0.34458,
    "c": 0.05827,
    "h": 239
  },
  "luminance": 0.04172
}

Semantic roles & 50–950 ramp

primary

#183D54

secondary

#8B5B3D

accent

#8249DF

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #183D54

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

Preview Lab → · Contrast checker → · Palette generator →