#173C57#173C57

#173C57 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.3% C 0.063 H 243.3°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#173C57
RGB	rgb(23, 60, 87)
HSL	hsl(205, 58%, 22%)
HSV	hsv(205, 74%, 34%)
CMYK	cmyk(73.6%, 31%, 0%, 65.9%)
CIE-LAB	lab(24.00, -3.15, -20.08)
CIE-LCH	lch(24.00, 20.33, 261.09°)
OKLab	oklab(34.32% -0.0285 -0.0567)
OKLCH	oklch(34.32% 0.063 243.3)
XYZ	xyz(3.6889, 4.1016, 9.6123)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C57 #573217

analogous

#175752 #173C57 #171C57

triadic

#173C57 #57173C #3C5717

tetradic

#173C57 #521757 #573217 #1C5717

square

#173C57 #521757 #573217 #1C5717

split-complementary

#173C57 #57171C #575217

monochromatic

#061118 #0A1B27 #173C57 #245D87 #317FB8

Accessibility & contrast

On white

11.54

#173C57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173C57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C57

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C57	#FFFFFF	#000000	##FFFFFF
##173C57	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303D58

Deuteranopia (green-blind)

#273657

Tritanopia (blue-blind)

#004345

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173c57;
/* rgb */ color: rgb(23, 60, 87);
/* oklch */ color: oklch(34.3% 0.063 243.3);

Tailwind

colors: {
  custom: {
    50: '#5d7186',
    500: '#173c57',
    950: '#000000',
  },
}

SCSS

$custom: #173c57;
$custom-light: #5d7186;
$custom-dark: #000000;

JSON

{
  "hex": "#173c57",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 87
  },
  "hsl": {
    "h": 205.313,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.3432,
    "c": 0.06342,
    "h": 243.3
  },
  "luminance": 0.04102
}

Semantic roles & 50–950 ramp

primary

#173C57

secondary

#8E5E3C

accent

#8846E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173C57

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

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