#173C66#173C66

#173C66 is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.3% C 0.085 H 253.7°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#173C66
RGB	rgb(23, 60, 102)
HSL	hsl(212, 63%, 25%)
HSV	hsv(212, 77%, 40%)
CMYK	cmyk(77.5%, 41.2%, 0%, 60%)
CIE-LAB	lab(24.87, 2.92, -28.48)
CIE-LCH	lch(24.87, 28.63, 275.86°)
OKLab	oklab(35.28% -0.0237 -0.0812)
OKLCH	oklch(35.28% 0.085 253.7)
XYZ	xyz(4.3666, 4.3727, 13.1817)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C66 #664117

analogous

#176466 #173C66 #1A1766

triadic

#173C66 #66173C #3C6617

tetradic

#173C66 #661764 #664117 #17661A

square

#173C66 #661764 #664117 #17661A

split-complementary

#173C66 #661A17 #646617

monochromatic

#060F19 #0C1F34 #173C66 #225998 #2E77CA

Accessibility & contrast

On white

11.20

#173C66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#173C66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C66

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C66	#FFFFFF	#000000	##FFFFFF
##173C66	1.00	11.20	1.87	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283F68

Deuteranopia (green-blind)

#1C3865

Tritanopia (blue-blind)

#00464C

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173c66;
/* rgb */ color: rgb(23, 60, 102);
/* oklch */ color: oklch(35.3% 0.085 253.7);

Tailwind

colors: {
  custom: {
    50: '#607192',
    500: '#173c66',
    950: '#000000',
  },
}

SCSS

$custom: #173c66;
$custom-light: #607192;
$custom-dark: #000000;

JSON

{
  "hex": "#173c66",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 102
  },
  "hsl": {
    "h": 211.899,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.35279,
    "c": 0.08459,
    "h": 253.7
  },
  "luminance": 0.04373
}

Semantic roles & 50–950 ramp

primary

#173C66

secondary

#9C6F3C

accent

#9942E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05070D

muted

#7A7A7E

Preview Lab

Preview with #173C66

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

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