#173A66#173A66

#173A66 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.8% C 0.087 H 255.6°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#173A66
RGB	rgb(23, 58, 102)
HSL	hsl(213, 63%, 25%)
HSV	hsv(213, 77%, 40%)
CMYK	cmyk(77.5%, 43.1%, 0%, 60%)
CIE-LAB	lab(24.22, 4.31, -29.51)
CIE-LCH	lch(24.22, 29.83, 278.31°)
OKLab	oklab(34.77% -0.0217 -0.0843)
OKLCH	oklch(34.77% 0.087 255.6)
XYZ	xyz(4.2638, 4.1671, 13.1474)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A66 #664317

analogous

#176266 #173A66 #1C1766

triadic

#173A66 #66173A #3A6617

tetradic

#173A66 #661762 #664317 #17661C

square

#173A66 #661762 #664317 #17661C

split-complementary

#173A66 #661C17 #626617

monochromatic

#060E19 #0C1E34 #173A66 #225698 #2E73CA

Accessibility & contrast

On white

11.45

#173A66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#173A66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A66

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A66	#FFFFFF	#000000	##FFFFFF
##173A66	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#253E68

Deuteranopia (green-blind)

#183665

Tritanopia (blue-blind)

#00444B

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173a66;
/* rgb */ color: rgb(23, 58, 102);
/* oklch */ color: oklch(34.8% 0.087 255.6);

Tailwind

colors: {
  custom: {
    50: '#606f92',
    500: '#173a66',
    950: '#000000',
  },
}

SCSS

$custom: #173a66;
$custom-light: #606f92;
$custom-dark: #000000;

JSON

{
  "hex": "#173a66",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 102
  },
  "hsl": {
    "h": 213.418,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.34772,
    "c": 0.08701,
    "h": 255.6
  },
  "luminance": 0.04168
}

Semantic roles & 50–950 ramp

primary

#173A66

secondary

#9C723C

accent

#9D42E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05070D

muted

#7A7A7E

Preview Lab

Preview with #173A66

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

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