#173A51#173A51

#173A51 is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.4% C 0.057 H 240.3°. Best body text is #FFFFFF at 11.93:1 contrast (WCAG AA passes).

Color values

HEX	#173A51
RGB	rgb(23, 58, 81)
HSL	hsl(204, 56%, 20%)
HSV	hsv(204, 72%, 32%)
CMYK	cmyk(71.6%, 28.4%, 0%, 68.2%)
CIE-LAB	lab(23.01, -4.18, -17.69)
CIE-LCH	lch(23.01, 18.17, 256.71°)
OKLab	oklab(33.43% -0.0283 -0.0498)
OKLCH	oklch(33.43% 0.057 240.3)
XYZ	xyz(3.3510, 3.8020, 8.3402)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A51 #512E17

analogous

#17514B #173A51 #171D51

triadic

#173A51 #51173A #3A5117

tetradic

#173A51 #4B1751 #512E17 #1D5117

square

#173A51 #4B1751 #512E17 #1D5117

split-complementary

#173A51 #51171D #514B17

monochromatic

#071118 #091821 #173A51 #255C81 #327EB0

Accessibility & contrast

On white

11.93

#173A51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#173A51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A51

11.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A51	#FFFFFF	#000000	##FFFFFF
##173A51	1.00	11.93	1.76	11.93
#FFFFFF	11.93	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3A52

Deuteranopia (green-blind)

#283451

Tritanopia (blue-blind)

#004042

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173a51;
/* rgb */ color: rgb(23, 58, 81);
/* oklch */ color: oklch(33.4% 0.057 240.3);

Tailwind

colors: {
  custom: {
    50: '#5b7082',
    500: '#173a51',
    950: '#000000',
  },
}

SCSS

$custom: #173a51;
$custom-light: #5b7082;
$custom-dark: #000000;

JSON

{
  "hex": "#173a51",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 81
  },
  "hsl": {
    "h": 203.793,
    "s": 55.769,
    "l": 20.392
  },
  "oklch": {
    "l": 0.33426,
    "c": 0.05726,
    "h": 240.3
  },
  "luminance": 0.03802
}

Semantic roles & 50–950 ramp

primary

#173A51

secondary

#885A3C

accent

#8449DF

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173A51

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

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