#173F58#173F58

#173F58 is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.062 H 239.5°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#173F58
RGB	rgb(23, 63, 88)
HSL	hsl(203, 59%, 22%)
HSV	hsv(203, 74%, 35%)
CMYK	cmyk(73.9%, 28.4%, 0%, 65.5%)
CIE-LAB	lab(25.08, -4.74, -19.05)
CIE-LCH	lch(25.08, 19.63, 256.04°)
OKLab	oklab(35.19% -0.0316 -0.0537)
OKLCH	oklch(35.19% 0.062 239.5)
XYZ	xyz(3.8916, 4.4413, 9.8828)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F58 #583017

analogous

#175851 #173F58 #171F58

triadic

#173F58 #58173F #3F5817

tetradic

#173F58 #511758 #583017 #1F5817

square

#173F58 #511758 #583017 #1F5817

split-complementary

#173F58 #58171F #585117

monochromatic

#061118 #0A1C27 #173F58 #246289 #3084B9

Accessibility & contrast

On white

11.12

#173F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F58

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F58	#FFFFFF	#000000	##FFFFFF
##173F58	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333F59

Deuteranopia (green-blind)

#2B3958

Tritanopia (blue-blind)

#004548

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173f58;
/* rgb */ color: rgb(23, 63, 88);
/* oklch */ color: oklch(35.2% 0.062 239.5);

Tailwind

colors: {
  custom: {
    50: '#5d7387',
    500: '#173f58',
    950: '#000000',
  },
}

SCSS

$custom: #173f58;
$custom-light: #5d7387;
$custom-dark: #000000;

JSON

{
  "hex": "#173f58",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 88
  },
  "hsl": {
    "h": 203.077,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.35188,
    "c": 0.06229,
    "h": 239.5
  },
  "luminance": 0.04442
}

Semantic roles & 50–950 ramp

primary

#173F58

secondary

#8F5C3C

accent

#8246E2

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #173F58

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

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