#173C63#173C63

#173C63 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.1% C 0.080 H 252.2°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#173C63
RGB	rgb(23, 60, 99)
HSL	hsl(211, 62%, 24%)
HSV	hsv(211, 77%, 39%)
CMYK	cmyk(76.8%, 39.4%, 0%, 61.2%)
CIE-LAB	lab(24.68, 1.69, -26.83)
CIE-LCH	lch(24.68, 26.88, 273.61°)
OKLab	oklab(35.08% -0.0246 -0.0764)
OKLCH	oklch(35.08% 0.08 252.2)
XYZ	xyz(4.2205, 4.3143, 12.4123)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C63 #633E17

analogous

#176263 #173C63 #181763

triadic

#173C63 #63173C #3C6317

tetradic

#173C63 #631762 #633E17 #176318

square

#173C63 #631762 #633E17 #176318

split-complementary

#173C63 #631817 #626317

monochromatic

#060F19 #0B1E31 #173C63 #235A95 #2E78C6

Accessibility & contrast

On white

11.27

#173C63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173C63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C63

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C63	#FFFFFF	#000000	##FFFFFF
##173C63	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3E65

Deuteranopia (green-blind)

#1F3762

Tritanopia (blue-blind)

#00454A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173c63;
/* rgb */ color: rgb(23, 60, 99);
/* oklch */ color: oklch(35.1% 0.080 252.2);

Tailwind

colors: {
  custom: {
    50: '#5f718f',
    500: '#173c63',
    950: '#000000',
  },
}

SCSS

$custom: #173c63;
$custom-light: #5f718f;
$custom-dark: #000000;

JSON

{
  "hex": "#173c63",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 99
  },
  "hsl": {
    "h": 210.789,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.35077,
    "c": 0.08022,
    "h": 252.2
  },
  "luminance": 0.04315
}

Semantic roles & 50–950 ramp

primary

#173C63

secondary

#9A6C3C

accent

#9642E5

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173C63

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

Preview Lab → · Contrast checker → · Palette generator →