#173F4F#173F4F

#173F4F is a dark, muted cyan. Relative luminance 0.043; OKLCH L 34.7% C 0.052 H 227.6°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#173F4F
RGB	rgb(23, 63, 79)
HSL	hsl(197, 55%, 20%)
HSV	hsv(197, 71%, 31%)
CMYK	cmyk(70.9%, 20.3%, 0%, 69%)
CIE-LAB	lab(24.64, -8.18, -13.83)
CIE-LCH	lch(24.64, 16.07, 239.38°)
OKLab	oklab(34.7% -0.0353 -0.0386)
OKLCH	oklch(34.7% 0.052 227.6)
XYZ	xyz(3.5416, 4.3013, 8.0392)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F4F #4F2717

analogous

#174F43 #173F4F #17234F

triadic

#173F4F #4F173F #3F4F17

tetradic

#173F4F #43174F #4F2717 #234F17

square

#173F4F #43174F #4F2717 #234F17

split-complementary

#173F4F #4F1723 #4F4317

monochromatic

#071318 #091920 #173F4F #25657E #338BAE

Accessibility & contrast

On white

11.29

#173F4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173F4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F4F

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F4F	#FFFFFF	#000000	##FFFFFF
##173F4F	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373E50

Deuteranopia (green-blind)

#2F384F

Tritanopia (blue-blind)

#004444

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173f4f;
/* rgb */ color: rgb(23, 63, 79);
/* oklch */ color: oklch(34.7% 0.052 227.6);

Tailwind

colors: {
  custom: {
    50: '#5b7480',
    500: '#173f4f',
    950: '#000000',
  },
}

SCSS

$custom: #173f4f;
$custom-light: #5b7480;
$custom-dark: #000000;

JSON

{
  "hex": "#173f4f",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 79
  },
  "hsl": {
    "h": 197.143,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.34697,
    "c": 0.05234,
    "h": 227.6
  },
  "luminance": 0.04302
}

Semantic roles & 50–950 ramp

primary

#173F4F

secondary

#86513C

accent

#744ADE

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #173F4F

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

Preview Lab → · Contrast checker → · Palette generator →