#183C63#183C63

#183C63 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.1% C 0.080 H 252.6°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#183C63
RGB	rgb(24, 60, 99)
HSL	hsl(211, 61%, 24%)
HSV	hsv(211, 76%, 39%)
CMYK	cmyk(75.8%, 39.4%, 0%, 61.2%)
CIE-LAB	lab(24.72, 1.86, -26.77)
CIE-LCH	lch(24.72, 26.83, 273.97°)
OKLab	oklab(35.12% -0.0238 -0.0762)
OKLCH	oklch(35.12% 0.08 252.6)
XYZ	xyz(4.2438, 4.3263, 12.4134)
Luminance	0.0433 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183C63 #633F18

analogous

#186263 #183C63 #1A1863

triadic

#183C63 #63183C #3C6318

tetradic

#183C63 #631862 #633F18 #18631A

square

#183C63 #631862 #633F18 #18631A

split-complementary

#183C63 #631A18 #626318

monochromatic

#060F19 #0C1E32 #183C63 #245A94 #3078C6

Accessibility & contrast

On white

11.26

#183C63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#183C63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183C63

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183C63	#FFFFFF	#000000	##FFFFFF
##183C63	1.00	11.26	1.87	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3F65

Deuteranopia (green-blind)

#1F3762

Tritanopia (blue-blind)

#00454A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183c63;
/* rgb */ color: rgb(24, 60, 99);
/* oklch */ color: oklch(35.1% 0.080 252.6);

Tailwind

colors: {
  custom: {
    50: '#60718f',
    500: '#183c63',
    950: '#000000',
  },
}

SCSS

$custom: #183c63;
$custom-light: #60718f;
$custom-dark: #000000;

JSON

{
  "hex": "#183c63",
  "rgb": {
    "r": 24,
    "g": 60,
    "b": 99
  },
  "hsl": {
    "h": 211.2,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.35117,
    "c": 0.0798,
    "h": 252.6
  },
  "luminance": 0.04327
}

Semantic roles & 50–950 ramp

primary

#183C63

secondary

#996D3E

accent

#9744E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #183C63

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

Preview Lab → · Contrast checker → · Palette generator →