#173B54#173B54

#173B54 is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 33.9% C 0.060 H 241.9°. Best body text is #FFFFFF at 11.73:1 contrast (WCAG AA passes).

Color values

HEX	#173B54
RGB	rgb(23, 59, 84)
HSL	hsl(205, 57%, 21%)
HSV	hsv(205, 73%, 33%)
CMYK	cmyk(72.6%, 29.8%, 0%, 67.1%)
CIE-LAB	lab(23.50, -3.67, -18.89)
CIE-LCH	lch(23.50, 19.24, 259.02°)
OKLab	oklab(33.87% -0.0284 -0.0532)
OKLCH	oklch(33.87% 0.06 241.9)
XYZ	xyz(3.5169, 3.9498, 8.9628)
Luminance	0.0395 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B54 #543017

analogous

#17544E #173B54 #171C54

triadic

#173B54 #54173B #3B5417

tetradic

#173B54 #4E1754 #543017 #1C5417

square

#173B54 #4E1754 #543017 #1C5417

split-complementary

#173B54 #54171C #544E17

monochromatic

#071118 #0A1924 #173B54 #245D84 #317EB4

Accessibility & contrast

On white

11.73

#173B54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#173B54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B54

11.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B54	#FFFFFF	#000000	##FFFFFF
##173B54	1.00	11.73	1.79	11.73
#FFFFFF	11.73	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303B55

Deuteranopia (green-blind)

#273554

Tritanopia (blue-blind)

#004144

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173b54;
/* rgb */ color: rgb(23, 59, 84);
/* oklch */ color: oklch(33.9% 0.060 241.9);

Tailwind

colors: {
  custom: {
    50: '#5c7084',
    500: '#173b54',
    950: '#000000',
  },
}

SCSS

$custom: #173b54;
$custom-light: #5c7084;
$custom-dark: #000000;

JSON

{
  "hex": "#173b54",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 84
  },
  "hsl": {
    "h": 204.59,
    "s": 57.009,
    "l": 20.98
  },
  "oklch": {
    "l": 0.33873,
    "c": 0.06033,
    "h": 241.9
  },
  "luminance": 0.0395
}

Semantic roles & 50–950 ramp

primary

#173B54

secondary

#8B5C3C

accent

#8648E0

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #173B54

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

Preview Lab → · Contrast checker → · Palette generator →