#173B53#173B53

#173B53 is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.8% C 0.059 H 240.8°. Best body text is #FFFFFF at 11.75:1 contrast (WCAG AA passes).

Color values

HEX	#173B53
RGB	rgb(23, 59, 83)
HSL	hsl(204, 57%, 21%)
HSV	hsv(204, 72%, 33%)
CMYK	cmyk(72.3%, 28.9%, 0%, 67.5%)
CIE-LAB	lab(23.45, -4.06, -18.31)
CIE-LCH	lch(23.45, 18.75, 257.51°)
OKLab	oklab(33.81% -0.0288 -0.0516)
OKLCH	oklch(33.81% 0.059 240.8)
XYZ	xyz(3.4781, 3.9343, 8.7580)
Luminance	0.0394 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B53 #532F17

analogous

#17534D #173B53 #171D53

triadic

#173B53 #53173B #3B5317

tetradic

#173B53 #4D1753 #532F17 #1D5317

square

#173B53 #4D1753 #532F17 #1D5317

split-complementary

#173B53 #53171D #534D17

monochromatic

#071118 #0A1923 #173B53 #245D83 #327FB3

Accessibility & contrast

On white

11.75

#173B53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#173B53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B53

11.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B53	#FFFFFF	#000000	##FFFFFF
##173B53	1.00	11.75	1.79	11.75
#FFFFFF	11.75	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303B54

Deuteranopia (green-blind)

#283553

Tritanopia (blue-blind)

#004143

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173b53;
/* rgb */ color: rgb(23, 59, 83);
/* oklch */ color: oklch(33.8% 0.059 240.8);

Tailwind

colors: {
  custom: {
    50: '#5c7083',
    500: '#173b53',
    950: '#000000',
  },
}

SCSS

$custom: #173b53;
$custom-light: #5c7083;
$custom-dark: #000000;

JSON

{
  "hex": "#173b53",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 83
  },
  "hsl": {
    "h": 204,
    "s": 56.604,
    "l": 20.784
  },
  "oklch": {
    "l": 0.33814,
    "c": 0.05905,
    "h": 240.8
  },
  "luminance": 0.03935
}

Semantic roles & 50–950 ramp

primary

#173B53

secondary

#8A5B3C

accent

#8548E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173B53

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

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