#173E56#173E56

#173E56 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.8% C 0.061 H 239.0°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#173E56
RGB	rgb(23, 62, 86)
HSL	hsl(203, 58%, 21%)
HSV	hsv(203, 73%, 34%)
CMYK	cmyk(73.3%, 27.9%, 0%, 66.3%)
CIE-LAB	lab(24.64, -4.86, -18.44)
CIE-LCH	lch(24.64, 19.07, 255.22°)
OKLab	oklab(34.8% -0.0312 -0.0519)
OKLCH	oklch(34.8% 0.061 239)
XYZ	xyz(3.7550, 4.2989, 9.4342)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E56 #562F17

analogous

#17564F #173E56 #171F56

triadic

#173E56 #56173E #3E5617

tetradic

#173E56 #4F1756 #562F17 #1F5617

square

#173E56 #4F1756 #562F17 #1F5617

split-complementary

#173E56 #56171F #564F17

monochromatic

#061118 #0A1B26 #173E56 #246186 #3184B7

Accessibility & contrast

On white

11.29

#173E56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173E56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E56

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E56	#FFFFFF	#000000	##FFFFFF
##173E56	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333E57

Deuteranopia (green-blind)

#2A3856

Tritanopia (blue-blind)

#004446

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173e56;
/* rgb */ color: rgb(23, 62, 86);
/* oklch */ color: oklch(34.8% 0.061 239.0);

Tailwind

colors: {
  custom: {
    50: '#5d7385',
    500: '#173e56',
    950: '#000000',
  },
}

SCSS

$custom: #173e56;
$custom-light: #5d7385;
$custom-dark: #000000;

JSON

{
  "hex": "#173e56",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 86
  },
  "hsl": {
    "h": 202.857,
    "s": 57.798,
    "l": 21.373
  },
  "oklch": {
    "l": 0.34802,
    "c": 0.06056,
    "h": 239
  },
  "luminance": 0.04299
}

Semantic roles & 50–950 ramp

primary

#173E56

secondary

#8D5B3C

accent

#8247E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #173E56

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

Preview Lab → · Contrast checker → · Palette generator →