#173A50#173A50

#173A50 is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.4% C 0.056 H 239.1°. Best body text is #FFFFFF at 11.95:1 contrast (WCAG AA passes).

Color values

HEX	#173A50
RGB	rgb(23, 58, 80)
HSL	hsl(203, 55%, 20%)
HSV	hsv(203, 71%, 31%)
CMYK	cmyk(71.2%, 27.5%, 0%, 68.6%)
CIE-LAB	lab(22.95, -4.57, -17.10)
CIE-LCH	lch(22.95, 17.70, 255.05°)
OKLab	oklab(33.37% -0.0287 -0.0481)
OKLCH	oklch(33.37% 0.056 239.1)
XYZ	xyz(3.3138, 3.7871, 8.1442)
Luminance	0.0379 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A50 #502D17

analogous

#175049 #173A50 #171D50

triadic

#173A50 #50173A #3A5017

tetradic

#173A50 #491750 #502D17 #1D5017

square

#173A50 #491750 #502D17 #1D5017

split-complementary

#173A50 #50171D #504917

monochromatic

#071118 #091820 #173A50 #255C80 #327FAF

Accessibility & contrast

On white

11.95

#173A50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#173A50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A50

11.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A50	#FFFFFF	#000000	##FFFFFF
##173A50	1.00	11.95	1.76	11.95
#FFFFFF	11.95	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303A51

Deuteranopia (green-blind)

#283450

Tritanopia (blue-blind)

#004042

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173a50;
/* rgb */ color: rgb(23, 58, 80);
/* oklch */ color: oklch(33.4% 0.056 239.1);

Tailwind

colors: {
  custom: {
    50: '#5b7081',
    500: '#173a50',
    950: '#000000',
  },
}

SCSS

$custom: #173a50;
$custom-light: #5b7081;
$custom-dark: #000000;

JSON

{
  "hex": "#173a50",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 80
  },
  "hsl": {
    "h": 203.158,
    "s": 55.34,
    "l": 20.196
  },
  "oklch": {
    "l": 0.33369,
    "c": 0.056,
    "h": 239.1
  },
  "luminance": 0.03787
}

Semantic roles & 50–950 ramp

primary

#173A50

secondary

#87593C

accent

#8349DF

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173A50

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

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