#173A4F#173A4F

#173A4F is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.3% C 0.055 H 237.9°. Best body text is #FFFFFF at 11.97:1 contrast (WCAG AA passes).

Color values

HEX	#173A4F
RGB	rgb(23, 58, 79)
HSL	hsl(203, 55%, 20%)
HSV	hsv(203, 71%, 31%)
CMYK	cmyk(70.9%, 26.6%, 0%, 69%)
CIE-LAB	lab(22.90, -4.95, -16.52)
CIE-LCH	lch(22.90, 17.25, 253.31°)
OKLab	oklab(33.31% -0.0291 -0.0464)
OKLCH	oklch(33.31% 0.055 237.9)
XYZ	xyz(3.2771, 3.7724, 7.9511)
Luminance	0.0377 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A4F #4F2C17

analogous

#174F48 #173A4F #171E4F

triadic

#173A4F #4F173A #3A4F17

tetradic

#173A4F #48174F #4F2C17 #1E4F17

square

#173A4F #48174F #4F2C17 #1E4F17

split-complementary

#173A4F #4F171E #4F4817

monochromatic

#071118 #091720 #173A4F #255D7E #3380AE

Accessibility & contrast

On white

11.97

#173A4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#173A4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A4F

11.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A4F	#FFFFFF	#000000	##FFFFFF
##173A4F	1.00	11.97	1.75	11.97
#FFFFFF	11.97	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303A50

Deuteranopia (green-blind)

#29344F

Tritanopia (blue-blind)

#003F41

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173a4f;
/* rgb */ color: rgb(23, 58, 79);
/* oklch */ color: oklch(33.3% 0.055 237.9);

Tailwind

colors: {
  custom: {
    50: '#5b7080',
    500: '#173a4f',
    950: '#000000',
  },
}

SCSS

$custom: #173a4f;
$custom-light: #5b7080;
$custom-dark: #000000;

JSON

{
  "hex": "#173a4f",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 79
  },
  "hsl": {
    "h": 202.5,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.33313,
    "c": 0.05477,
    "h": 237.9
  },
  "luminance": 0.03773
}

Semantic roles & 50–950 ramp

primary

#173A4F

secondary

#86583C

accent

#814ADE

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173A4F

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

Preview Lab → · Contrast checker → · Palette generator →