#173F63#173F63

#173F63 is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.9% C 0.077 H 248.8°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#173F63
RGB	rgb(23, 63, 99)
HSL	hsl(208, 62%, 24%)
HSV	hsv(208, 77%, 39%)
CMYK	cmyk(76.8%, 36.4%, 0%, 61.2%)
CIE-LAB	lab(25.68, -0.35, -25.26)
CIE-LCH	lch(25.68, 25.26, 269.21°)
OKLab	oklab(35.85% -0.0278 -0.0717)
OKLCH	oklch(35.85% 0.077 248.8)
XYZ	xyz(4.3821, 4.6375, 12.4661)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F63 #633B17

analogous

#176361 #173F63 #171963

triadic

#173F63 #63173F #3F6317

tetradic

#173F63 #611763 #633B17 #196317

square

#173F63 #611763 #633B17 #196317

split-complementary

#173F63 #631719 #636117

monochromatic

#061019 #0B1F31 #173F63 #235F95 #2E7EC6

Accessibility & contrast

On white

10.89

#173F63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#173F63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F63

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F63	#FFFFFF	#000000	##FFFFFF
##173F63	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4165

Deuteranopia (green-blind)

#243A62

Tritanopia (blue-blind)

#00484C

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173f63;
/* rgb */ color: rgb(23, 63, 99);
/* oklch */ color: oklch(35.9% 0.077 248.8);

Tailwind

colors: {
  custom: {
    50: '#5f738f',
    500: '#173f63',
    950: '#000000',
  },
}

SCSS

$custom: #173f63;
$custom-light: #5f738f;
$custom-dark: #000000;

JSON

{
  "hex": "#173f63",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 99
  },
  "hsl": {
    "h": 208.421,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.35854,
    "c": 0.07692,
    "h": 248.8
  },
  "luminance": 0.04638
}

Semantic roles & 50–950 ramp

primary

#173F63

secondary

#9A683C

accent

#9042E5

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #173F63

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

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