#173D63#173D63

#173D63 is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.3% C 0.079 H 251.1°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#173D63
RGB	rgb(23, 61, 99)
HSL	hsl(210, 62%, 24%)
HSV	hsv(210, 77%, 39%)
CMYK	cmyk(76.8%, 38.4%, 0%, 61.2%)
CIE-LAB	lab(25.01, 1.01, -26.31)
CIE-LCH	lch(25.01, 26.33, 272.20°)
OKLab	oklab(35.34% -0.0256 -0.0748)
OKLCH	oklch(35.34% 0.079 251.1)
XYZ	xyz(4.2734, 4.4200, 12.4299)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D63 #633D17

analogous

#176363 #173D63 #171763

triadic

#173D63 #63173D #3D6317

tetradic

#173D63 #631763 #633D17 #176317

square

#173D63 #631763 #633D17 #176317

split-complementary

#173D63 #631717 #636317

monochromatic

#060F19 #0B1E31 #173D63 #235C95 #2E7AC6

Accessibility & contrast

On white

11.15

#173D63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#173D63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D63

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D63	#FFFFFF	#000000	##FFFFFF
##173D63	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3F65

Deuteranopia (green-blind)

#213862

Tritanopia (blue-blind)

#00464B

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173d63;
/* rgb */ color: rgb(23, 61, 99);
/* oklch */ color: oklch(35.3% 0.079 251.1);

Tailwind

colors: {
  custom: {
    50: '#5f728f',
    500: '#173d63',
    950: '#000000',
  },
}

SCSS

$custom: #173d63;
$custom-light: #5f728f;
$custom-dark: #000000;

JSON

{
  "hex": "#173d63",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 99
  },
  "hsl": {
    "h": 210,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.35335,
    "c": 0.07908,
    "h": 251.1
  },
  "luminance": 0.0442
}

Semantic roles & 50–950 ramp

primary

#173D63

secondary

#9A6B3C

accent

#9442E5

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173D63

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

Preview Lab → · Contrast checker → · Palette generator →