#173759#173759

#173759 is a dark, moderate cyan. Relative luminance 0.036; OKLCH L 33.1% C 0.071 H 252.0°. Best body text is #FFFFFF at 12.16:1 contrast (WCAG AA passes).

Color values

HEX	#173759
RGB	rgb(23, 55, 89)
HSL	hsl(211, 59%, 22%)
HSV	hsv(211, 74%, 35%)
CMYK	cmyk(74.2%, 38.2%, 0%, 65.1%)
CIE-LAB	lab(22.43, 1.06, -23.88)
CIE-LCH	lch(22.43, 23.90, 272.54°)
OKLab	oklab(33.12% -0.022 -0.0678)
OKLCH	oklch(33.12% 0.071 252)
XYZ	xyz(3.5220, 3.6354, 9.9653)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173759 #593917

analogous

#175859 #173759 #181759

triadic

#173759 #591737 #375917

tetradic

#173759 #591758 #593917 #175918

square

#173759 #591758 #593917 #175918

split-complementary

#173759 #591817 #585917

monochromatic

#060F18 #0A1928 #173759 #24558A #3073BA

Accessibility & contrast

On white

12.16

#173759 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#173759 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173759

12.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173759	#FFFFFF	#000000	##FFFFFF
##173759	1.00	12.16	1.73	12.16
#FFFFFF	12.16	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28395A

Deuteranopia (green-blind)

#1E3358

Tritanopia (blue-blind)

#003F43

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #173759;
/* rgb */ color: rgb(23, 55, 89);
/* oklch */ color: oklch(33.1% 0.071 252.0);

Tailwind

colors: {
  custom: {
    50: '#5d6d88',
    500: '#173759',
    950: '#000000',
  },
}

SCSS

$custom: #173759;
$custom-light: #5d6d88;
$custom-dark: #000000;

JSON

{
  "hex": "#173759",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 89
  },
  "hsl": {
    "h": 210.909,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.33116,
    "c": 0.07129,
    "h": 252
  },
  "luminance": 0.03636
}

Semantic roles & 50–950 ramp

primary

#173759

secondary

#90673C

accent

#9646E2

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173759

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

Preview Lab → · Contrast checker → · Palette generator →