#173A60#173A60

#173A60 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.4% C 0.078 H 252.7°. Best body text is #FFFFFF at 11.60:1 contrast (WCAG AA passes).

Color values

HEX	#173A60
RGB	rgb(23, 58, 96)
HSL	hsl(211, 61%, 23%)
HSV	hsv(211, 76%, 38%)
CMYK	cmyk(76%, 39.6%, 0%, 62.4%)
CIE-LAB	lab(23.84, 1.84, -26.22)
CIE-LCH	lch(23.84, 26.28, 274.02°)
OKLab	oklab(34.36% -0.0233 -0.0746)
OKLCH	oklch(34.36% 0.078 252.7)
XYZ	xyz(3.9769, 4.0524, 11.6367)
Luminance	0.0405 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A60 #603D17

analogous

#175E60 #173A60 #181760

triadic

#173A60 #60173A #3A6017

tetradic

#173A60 #60175E #603D17 #176018

square

#173A60 #60175E #603D17 #176018

split-complementary

#173A60 #601817 #5E6017

monochromatic

#060F19 #0B1C2F #173A60 #235891 #2F76C3

Accessibility & contrast

On white

11.60

#173A60 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#173A60 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A60

11.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A60	#FFFFFF	#000000	##FFFFFF
##173A60	1.00	11.60	1.81	11.60
#FFFFFF	11.60	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#293C62

Deuteranopia (green-blind)

#1E365F

Tritanopia (blue-blind)

#004348

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173a60;
/* rgb */ color: rgb(23, 58, 96);
/* oklch */ color: oklch(34.4% 0.078 252.7);

Tailwind

colors: {
  custom: {
    50: '#5f6f8d',
    500: '#173a60',
    950: '#000000',
  },
}

SCSS

$custom: #173a60;
$custom-light: #5f6f8d;
$custom-dark: #000000;

JSON

{
  "hex": "#173a60",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 96
  },
  "hsl": {
    "h": 211.233,
    "s": 61.345,
    "l": 23.333
  },
  "oklch": {
    "l": 0.34361,
    "c": 0.07814,
    "h": 252.7
  },
  "luminance": 0.04053
}

Semantic roles & 50–950 ramp

primary

#173A60

secondary

#976B3C

accent

#9743E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173A60

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

Preview Lab → · Contrast checker → · Palette generator →