#173E63#173E63

#173E63 is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.6% C 0.078 H 250.0°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#173E63
RGB	rgb(23, 62, 99)
HSL	hsl(209, 62%, 24%)
HSV	hsv(209, 77%, 39%)
CMYK	cmyk(76.8%, 37.4%, 0%, 61.2%)
CIE-LAB	lab(25.34, 0.33, -25.78)
CIE-LCH	lch(25.34, 25.79, 270.73°)
OKLab	oklab(35.59% -0.0267 -0.0733)
OKLCH	oklch(35.59% 0.078 250)
XYZ	xyz(4.3273, 4.5278, 12.4479)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E63 #633C17

analogous

#176362 #173E63 #171863

triadic

#173E63 #63173E #3E6317

tetradic

#173E63 #621763 #633C17 #186317

square

#173E63 #621763 #633C17 #186317

split-complementary

#173E63 #631718 #636217

monochromatic

#061019 #0B1F31 #173E63 #235D95 #2E7CC6

Accessibility & contrast

On white

11.02

#173E63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#173E63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E63

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E63	#FFFFFF	#000000	##FFFFFF
##173E63	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4065

Deuteranopia (green-blind)

#223962

Tritanopia (blue-blind)

#00474B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173e63;
/* rgb */ color: rgb(23, 62, 99);
/* oklch */ color: oklch(35.6% 0.078 250.0);

Tailwind

colors: {
  custom: {
    50: '#5f738f',
    500: '#173e63',
    950: '#000000',
  },
}

SCSS

$custom: #173e63;
$custom-light: #5f738f;
$custom-dark: #000000;

JSON

{
  "hex": "#173e63",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 99
  },
  "hsl": {
    "h": 209.211,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.35594,
    "c": 0.07799,
    "h": 250
  },
  "luminance": 0.04528
}

Semantic roles & 50–950 ramp

primary

#173E63

secondary

#9A6A3C

accent

#9242E5

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #173E63

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

Preview Lab → · Contrast checker → · Palette generator →