#173D59#173D59

#173D59 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.7% C 0.065 H 243.7°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#173D59
RGB	rgb(23, 61, 89)
HSL	hsl(205, 59%, 22%)
HSV	hsv(205, 74%, 35%)
CMYK	cmyk(74.2%, 31.5%, 0%, 65.1%)
CIE-LAB	lab(24.45, -3.02, -20.69)
CIE-LCH	lch(24.45, 20.91, 261.69°)
OKLab	oklab(34.71% -0.0289 -0.0584)
OKLCH	oklch(34.71% 0.065 243.7)
XYZ	xyz(3.8246, 4.2405, 10.0662)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D59 #593317

analogous

#175954 #173D59 #171C59

triadic

#173D59 #59173D #3D5917

tetradic

#173D59 #541759 #593317 #1C5917

square

#173D59 #541759 #593317 #1C5917

split-complementary

#173D59 #59171C #595417

monochromatic

#061118 #0A1C28 #173D59 #245E8A #3080BA

Accessibility & contrast

On white

11.36

#173D59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#173D59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D59

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D59	#FFFFFF	#000000	##FFFFFF
##173D59	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303E5A

Deuteranopia (green-blind)

#273758

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173d59;
/* rgb */ color: rgb(23, 61, 89);
/* oklch */ color: oklch(34.7% 0.065 243.7);

Tailwind

colors: {
  custom: {
    50: '#5d7288',
    500: '#173d59',
    950: '#000000',
  },
}

SCSS

$custom: #173d59;
$custom-light: #5d7288;
$custom-dark: #000000;

JSON

{
  "hex": "#173d59",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 89
  },
  "hsl": {
    "h": 205.455,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.34708,
    "c": 0.0652,
    "h": 243.7
  },
  "luminance": 0.04241
}

Semantic roles & 50–950 ramp

primary

#173D59

secondary

#90603C

accent

#8846E2

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173D59

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

Preview Lab → · Contrast checker → · Palette generator →