#173E55#173E55

#173E55 is a dark, muted cyan. Relative luminance 0.043; OKLCH L 34.7% C 0.059 H 237.8°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#173E55
RGB	rgb(23, 62, 85)
HSL	hsl(202, 57%, 21%)
HSV	hsv(202, 73%, 33%)
CMYK	cmyk(72.9%, 27.1%, 0%, 66.7%)
CIE-LAB	lab(24.59, -5.25, -17.86)
CIE-LCH	lch(24.59, 18.62, 253.61°)
OKLab	oklab(34.75% -0.0316 -0.0502)
OKLCH	oklch(34.75% 0.059 237.8)
XYZ	xyz(3.7150, 4.2829, 9.2235)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E55 #552E17

analogous

#17554D #173E55 #171F55

triadic

#173E55 #55173E #3E5517

tetradic

#173E55 #4D1755 #552E17 #1F5517

square

#173E55 #4D1755 #552E17 #1F5517

split-complementary

#173E55 #55171F #554D17

monochromatic

#071218 #0A1B25 #173E55 #246185 #3184B5

Accessibility & contrast

On white

11.31

#173E55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173E55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E55

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E55	#FFFFFF	#000000	##FFFFFF
##173E55	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333E56

Deuteranopia (green-blind)

#2B3855

Tritanopia (blue-blind)

#004446

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173e55;
/* rgb */ color: rgb(23, 62, 85);
/* oklch */ color: oklch(34.7% 0.059 237.8);

Tailwind

colors: {
  custom: {
    50: '#5c7385',
    500: '#173e55',
    950: '#000000',
  },
}

SCSS

$custom: #173e55;
$custom-light: #5c7385;
$custom-dark: #000000;

JSON

{
  "hex": "#173e55",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 85
  },
  "hsl": {
    "h": 202.258,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.34746,
    "c": 0.05934,
    "h": 237.8
  },
  "luminance": 0.04283
}

Semantic roles & 50–950 ramp

primary

#173E55

secondary

#8C5A3C

accent

#8047E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #173E55

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

Preview Lab → · Contrast checker → · Palette generator →