#173B64#173B64

#173B64 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.9% C 0.083 H 253.7°. Best body text is #FFFFFF at 11.38:1 contrast (WCAG AA passes).

Color values

HEX	#173B64
RGB	rgb(23, 59, 100)
HSL	hsl(212, 63%, 24%)
HSV	hsv(212, 77%, 39%)
CMYK	cmyk(77%, 41%, 0%, 60.8%)
CIE-LAB	lab(24.42, 2.79, -27.90)
CIE-LCH	lch(24.42, 28.04, 275.72°)
OKLab	oklab(34.89% -0.0232 -0.0795)
OKLCH	oklch(34.89% 0.083 253.7)
XYZ	xyz(4.2167, 4.2297, 12.6483)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B64 #644017

analogous

#176264 #173B64 #1A1764

triadic

#173B64 #64173B #3B6417

tetradic

#173B64 #641762 #644017 #17641A

square

#173B64 #641762 #644017 #17641A

split-complementary

#173B64 #641A17 #626417

monochromatic

#060F19 #0C1E32 #173B64 #225896 #2E76C8

Accessibility & contrast

On white

11.38

#173B64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#173B64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B64

11.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B64	#FFFFFF	#000000	##FFFFFF
##173B64	1.00	11.38	1.85	11.38
#FFFFFF	11.38	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283E66

Deuteranopia (green-blind)

#1C3763

Tritanopia (blue-blind)

#00454A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173b64;
/* rgb */ color: rgb(23, 59, 100);
/* oklch */ color: oklch(34.9% 0.083 253.7);

Tailwind

colors: {
  custom: {
    50: '#5f7090',
    500: '#173b64',
    950: '#000000',
  },
}

SCSS

$custom: #173b64;
$custom-light: #5f7090;
$custom-dark: #000000;

JSON

{
  "hex": "#173b64",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 100
  },
  "hsl": {
    "h": 211.948,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.34888,
    "c": 0.08284,
    "h": 253.7
  },
  "luminance": 0.0423
}

Semantic roles & 50–950 ramp

primary

#173B64

secondary

#9A6E3C

accent

#9942E6

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173B64

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

Preview Lab → · Contrast checker → · Palette generator →