#173E5B#173E5B

#173E5B is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.1% C 0.067 H 244.0°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#173E5B
RGB	rgb(23, 62, 91)
HSL	hsl(206, 60%, 22%)
HSV	hsv(206, 75%, 36%)
CMYK	cmyk(74.7%, 31.9%, 0%, 64.3%)
CIE-LAB	lab(24.90, -2.89, -21.30)
CIE-LCH	lch(24.90, 21.49, 262.27°)
OKLab	oklab(35.1% -0.0294 -0.0602)
OKLCH	oklch(35.1% 0.067 244)
XYZ	xyz(3.9636, 4.3823, 10.5325)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E5B #5B3417

analogous

#175B56 #173E5B #171C5B

triadic

#173E5B #5B173E #3E5B17

tetradic

#173E5B #56175B #5B3417 #1C5B17

square

#173E5B #56175B #5B3417 #1C5B17

split-complementary

#173E5B #5B171C #5B5617

monochromatic

#061118 #0B1D2A #173E5B #235F8C #3081BD

Accessibility & contrast

On white

11.19

#173E5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#173E5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E5B

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E5B	#FFFFFF	#000000	##FFFFFF
##173E5B	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313F5C

Deuteranopia (green-blind)

#28385A

Tritanopia (blue-blind)

#004548

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173e5b;
/* rgb */ color: rgb(23, 62, 91);
/* oklch */ color: oklch(35.1% 0.067 244.0);

Tailwind

colors: {
  custom: {
    50: '#5e7389',
    500: '#173e5b',
    950: '#000000',
  },
}

SCSS

$custom: #173e5b;
$custom-light: #5e7389;
$custom-dark: #000000;

JSON

{
  "hex": "#173e5b",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 91
  },
  "hsl": {
    "h": 205.588,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.35095,
    "c": 0.06696,
    "h": 244
  },
  "luminance": 0.04383
}

Semantic roles & 50–950 ramp

primary

#173E5B

secondary

#92613C

accent

#8845E3

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #173E5B

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

Preview Lab → · Contrast checker → · Palette generator →