#183553#183553

#183553 is a dark, moderate cyan. Relative luminance 0.034; OKLCH L 32.2% C 0.064 H 251.2°. Best body text is #FFFFFF at 12.55:1 contrast (WCAG AA passes).

Color values

HEX	#183553
RGB	rgb(24, 53, 83)
HSL	hsl(211, 55%, 21%)
HSV	hsv(211, 71%, 33%)
CMYK	cmyk(71.1%, 36.1%, 0%, 67.5%)
CIE-LAB	lab(21.45, 0.21, -21.45)
CIE-LCH	lch(21.45, 21.45, 270.57°)
OKLab	oklab(32.25% -0.0207 -0.0607)
OKLCH	oklch(32.25% 0.064 251.2)
XYZ	xyz(3.2106, 3.3646, 8.6622)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183553 #533618

analogous

#185253 #183553 #181853

triadic

#183553 #531835 #355318

tetradic

#183553 #531852 #533618 #185318

square

#183553 #531852 #533618 #185318

split-complementary

#183553 #531818 #525318

monochromatic

#070F18 #0A1724 #183553 #265382 #3372B2

Accessibility & contrast

On white

12.55

#183553 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#183553 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183553

12.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183553	#FFFFFF	#000000	##FFFFFF
##183553	1.00	12.55	1.67	12.55
#FFFFFF	12.55	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283754

Deuteranopia (green-blind)

#203152

Tritanopia (blue-blind)

#003C40

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #183553;
/* rgb */ color: rgb(24, 53, 83);
/* oklch */ color: oklch(32.2% 0.064 251.2);

Tailwind

colors: {
  custom: {
    50: '#5c6c83',
    500: '#183553',
    950: '#000000',
  },
}

SCSS

$custom: #183553;
$custom-light: #5c6c83;
$custom-dark: #000000;

JSON

{
  "hex": "#183553",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 83
  },
  "hsl": {
    "h": 210.508,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.32246,
    "c": 0.06417,
    "h": 251.2
  },
  "luminance": 0.03365
}

Semantic roles & 50–950 ramp

primary

#183553

secondary

#8A643D

accent

#9549DE

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060A

muted

#797A7C

Preview Lab

Preview with #183553

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

Preview Lab → · Contrast checker → · Palette generator →