#183355#183355

#183355 is a dark, moderate cyan. Relative luminance 0.032; OKLCH L 31.9% C 0.070 H 255.2°. Best body text is #FFFFFF at 12.78:1 contrast (WCAG AA passes).

Color values

HEX	#183355
RGB	rgb(24, 51, 85)
HSL	hsl(213, 56%, 21%)
HSV	hsv(213, 72%, 33%)
CMYK	cmyk(71.8%, 40%, 0%, 66.7%)
CIE-LAB	lab(20.89, 2.42, -23.66)
CIE-LCH	lch(20.89, 23.78, 275.83°)
OKLab	oklab(31.85% -0.0177 -0.0672)
OKLCH	oklch(31.85% 0.07 255.2)
XYZ	xyz(3.1996, 3.2174, 9.0450)
Luminance	0.0322 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183355 #553A18

analogous

#185255 #183355 #1C1855

triadic

#183355 #551833 #335518

tetradic

#183355 #551852 #553A18 #18551C

square

#183355 #551852 #553A18 #18551C

split-complementary

#183355 #551C18 #525518

monochromatic

#070E18 #0B1625 #183355 #255085 #336CB4

Accessibility & contrast

On white

12.78

#183355 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#183355 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183355

12.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183355	#FFFFFF	#000000	##FFFFFF
##183355	1.00	12.78	1.64	12.78
#FFFFFF	12.78	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#243556

Deuteranopia (green-blind)

#1B3054

Tritanopia (blue-blind)

#003B40

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #183355;
/* rgb */ color: rgb(24, 51, 85);
/* oklch */ color: oklch(31.9% 0.070 255.2);

Tailwind

colors: {
  custom: {
    50: '#5d6a85',
    500: '#183355',
    950: '#000000',
  },
}

SCSS

$custom: #183355;
$custom-light: #5d6a85;
$custom-dark: #000000;

JSON

{
  "hex": "#183355",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 85
  },
  "hsl": {
    "h": 213.443,
    "s": 55.963,
    "l": 21.373
  },
  "oklch": {
    "l": 0.31851,
    "c": 0.0695,
    "h": 255.2
  },
  "luminance": 0.03218
}

Semantic roles & 50–950 ramp

primary

#183355

secondary

#8C693D

accent

#9D49DF

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060B

muted

#797A7C

Preview Lab

Preview with #183355

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

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