#173E59#173E59

#173E59 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.0% C 0.064 H 242.1°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#173E59
RGB	rgb(23, 62, 89)
HSL	hsl(205, 59%, 22%)
HSV	hsv(205, 74%, 35%)
CMYK	cmyk(74.2%, 30.3%, 0%, 65.1%)
CIE-LAB	lab(24.79, -3.68, -20.16)
CIE-LCH	lch(24.79, 20.49, 259.64°)
OKLab	oklab(34.98% -0.0301 -0.0569)
OKLCH	oklch(34.98% 0.064 242.1)
XYZ	xyz(3.8785, 4.3483, 10.0842)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E59 #593217

analogous

#175953 #173E59 #171D59

triadic

#173E59 #59173E #3E5917

tetradic

#173E59 #531759 #593217 #1D5917

square

#173E59 #531759 #593217 #1D5917

split-complementary

#173E59 #59171D #595317

monochromatic

#061118 #0A1C28 #173E59 #24608A #3082BA

Accessibility & contrast

On white

11.23

#173E59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#173E59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E59

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E59	#FFFFFF	#000000	##FFFFFF
##173E59	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323E5A

Deuteranopia (green-blind)

#293859

Tritanopia (blue-blind)

#004547

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173e59;
/* rgb */ color: rgb(23, 62, 89);
/* oklch */ color: oklch(35.0% 0.064 242.1);

Tailwind

colors: {
  custom: {
    50: '#5d7388',
    500: '#173e59',
    950: '#000000',
  },
}

SCSS

$custom: #173e59;
$custom-light: #5d7388;
$custom-dark: #000000;

JSON

{
  "hex": "#173e59",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 89
  },
  "hsl": {
    "h": 204.545,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.34976,
    "c": 0.06434,
    "h": 242.1
  },
  "luminance": 0.04349
}

Semantic roles & 50–950 ramp

primary

#173E59

secondary

#905E3C

accent

#8646E2

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #173E59

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

Preview Lab → · Contrast checker → · Palette generator →