#173F57#173F57

#173F57 is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.1% C 0.061 H 238.4°. Best body text is #FFFFFF at 11.14:1 contrast (WCAG AA passes).

Color values

HEX	#173F57
RGB	rgb(23, 63, 87)
HSL	hsl(203, 58%, 22%)
HSV	hsv(203, 74%, 34%)
CMYK	cmyk(73.6%, 27.6%, 0%, 65.9%)
CIE-LAB	lab(25.03, -5.13, -18.48)
CIE-LCH	lch(25.03, 19.18, 254.50°)
OKLab	oklab(35.13% -0.032 -0.052)
OKLCH	oklch(35.13% 0.061 238.4)
XYZ	xyz(3.8505, 4.4249, 9.6661)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F57 #572F17

analogous

#17574F #173F57 #171F57

triadic

#173F57 #57173F #3F5717

tetradic

#173F57 #4F1757 #572F17 #1F5717

square

#173F57 #4F1757 #572F17 #1F5717

split-complementary

#173F57 #57171F #574F17

monochromatic

#061218 #0A1C27 #173F57 #246287 #3185B8

Accessibility & contrast

On white

11.14

#173F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F57

11.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F57	#FFFFFF	#000000	##FFFFFF
##173F57	1.00	11.14	1.89	11.14
#FFFFFF	11.14	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343F58

Deuteranopia (green-blind)

#2B3957

Tritanopia (blue-blind)

#004547

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173f57;
/* rgb */ color: rgb(23, 63, 87);
/* oklch */ color: oklch(35.1% 0.061 238.4);

Tailwind

colors: {
  custom: {
    50: '#5d7386',
    500: '#173f57',
    950: '#000000',
  },
}

SCSS

$custom: #173f57;
$custom-light: #5d7386;
$custom-dark: #000000;

JSON

{
  "hex": "#173f57",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 87
  },
  "hsl": {
    "h": 202.5,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.35131,
    "c": 0.06107,
    "h": 238.4
  },
  "luminance": 0.04425
}

Semantic roles & 50–950 ramp

primary

#173F57

secondary

#8E5B3C

accent

#8146E1

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #173F57

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

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