#173A53#173A53

#173A53 is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.5% C 0.060 H 242.6°. Best body text is #FFFFFF at 11.89:1 contrast (WCAG AA passes).

Color values

HEX	#173A53
RGB	rgb(23, 58, 83)
HSL	hsl(205, 57%, 21%)
HSV	hsv(205, 72%, 33%)
CMYK	cmyk(72.3%, 30.1%, 0%, 67.5%)
CIE-LAB	lab(23.11, -3.39, -18.85)
CIE-LCH	lch(23.11, 19.15, 259.80°)
OKLab	oklab(33.54% -0.0276 -0.0531)
OKLCH	oklch(33.54% 0.06 242.6)
XYZ	xyz(3.4271, 3.8324, 8.7411)
Luminance	0.0383 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A53 #533017

analogous

#17534E #173A53 #171C53

triadic

#173A53 #53173A #3A5317

tetradic

#173A53 #4E1753 #533017 #1C5317

square

#173A53 #4E1753 #533017 #1C5317

split-complementary

#173A53 #53171C #534E17

monochromatic

#071118 #0A1923 #173A53 #245B83 #327DB3

Accessibility & contrast

On white

11.89

#173A53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#173A53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A53

11.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A53	#FFFFFF	#000000	##FFFFFF
##173A53	1.00	11.89	1.77	11.89
#FFFFFF	11.89	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3A54

Deuteranopia (green-blind)

#273453

Tritanopia (blue-blind)

#004043

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173a53;
/* rgb */ color: rgb(23, 58, 83);
/* oklch */ color: oklch(33.5% 0.060 242.6);

Tailwind

colors: {
  custom: {
    50: '#5c7083',
    500: '#173a53',
    950: '#000000',
  },
}

SCSS

$custom: #173a53;
$custom-light: #5c7083;
$custom-dark: #000000;

JSON

{
  "hex": "#173a53",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 83
  },
  "hsl": {
    "h": 205,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.33543,
    "c": 0.05985,
    "h": 242.6
  },
  "luminance": 0.03833
}

Semantic roles & 50–950 ramp

primary

#173A53

secondary

#8A5C3C

accent

#8748E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173A53

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

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