#173E57#173E57

#173E57 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.9% C 0.062 H 240.1°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#173E57
RGB	rgb(23, 62, 87)
HSL	hsl(203, 58%, 22%)
HSV	hsv(203, 74%, 34%)
CMYK	cmyk(73.6%, 28.7%, 0%, 65.9%)
CIE-LAB	lab(24.69, -4.47, -19.01)
CIE-LCH	lch(24.69, 19.53, 256.77°)
OKLab	oklab(34.86% -0.0308 -0.0536)
OKLCH	oklch(34.86% 0.062 240.1)
XYZ	xyz(3.7956, 4.3151, 9.6478)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E57 #573017

analogous

#175750 #173E57 #171E57

triadic

#173E57 #57173E #3E5717

tetradic

#173E57 #501757 #573017 #1E5717

square

#173E57 #501757 #573017 #1E5717

split-complementary

#173E57 #57171E #575017

monochromatic

#061118 #0A1C27 #173E57 #246087 #3183B8

Accessibility & contrast

On white

11.27

#173E57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173E57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E57

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E57	#FFFFFF	#000000	##FFFFFF
##173E57	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323E58

Deuteranopia (green-blind)

#2A3857

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173e57;
/* rgb */ color: rgb(23, 62, 87);
/* oklch */ color: oklch(34.9% 0.062 240.1);

Tailwind

colors: {
  custom: {
    50: '#5d7386',
    500: '#173e57',
    950: '#000000',
  },
}

SCSS

$custom: #173e57;
$custom-light: #5d7386;
$custom-dark: #000000;

JSON

{
  "hex": "#173e57",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 87
  },
  "hsl": {
    "h": 203.438,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.3486,
    "c": 0.0618,
    "h": 240.1
  },
  "luminance": 0.04316
}

Semantic roles & 50–950 ramp

primary

#173E57

secondary

#8E5C3C

accent

#8346E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #173E57

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

Preview Lab → · Contrast checker → · Palette generator →