#173B51#173B51

#173B51 is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.7% C 0.057 H 238.5°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#173B51
RGB	rgb(23, 59, 81)
HSL	hsl(203, 56%, 20%)
HSV	hsv(203, 72%, 32%)
CMYK	cmyk(71.6%, 27.2%, 0%, 68.2%)
CIE-LAB	lab(23.35, -4.84, -17.15)
CIE-LCH	lch(23.35, 17.82, 254.25°)
OKLab	oklab(33.7% -0.0295 -0.0482)
OKLCH	oklch(33.7% 0.057 238.5)
XYZ	xyz(3.4019, 3.9038, 8.3572)
Luminance	0.0390 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B51 #512D17

analogous

#17514A #173B51 #171E51

triadic

#173B51 #51173B #3B5117

tetradic

#173B51 #4A1751 #512D17 #1E5117

square

#173B51 #4A1751 #512D17 #1E5117

split-complementary

#173B51 #51171E #514A17

monochromatic

#071118 #091821 #173B51 #255E81 #3280B0

Accessibility & contrast

On white

11.79

#173B51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#173B51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B51

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B51	#FFFFFF	#000000	##FFFFFF
##173B51	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313B52

Deuteranopia (green-blind)

#293551

Tritanopia (blue-blind)

#004142

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173b51;
/* rgb */ color: rgb(23, 59, 81);
/* oklch */ color: oklch(33.7% 0.057 238.5);

Tailwind

colors: {
  custom: {
    50: '#5c7082',
    500: '#173b51',
    950: '#000000',
  },
}

SCSS

$custom: #173b51;
$custom-light: #5c7082;
$custom-dark: #000000;

JSON

{
  "hex": "#173b51",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 81
  },
  "hsl": {
    "h": 202.759,
    "s": 55.769,
    "l": 20.392
  },
  "oklch": {
    "l": 0.337,
    "c": 0.05654,
    "h": 238.5
  },
  "luminance": 0.03904
}

Semantic roles & 50–950 ramp

primary

#173B51

secondary

#88593C

accent

#8249DF

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173B51

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

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