#173A56#173A56

#173A56 is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.7% C 0.064 H 245.5°. Best body text is #FFFFFF at 11.82:1 contrast (WCAG AA passes).

Color values

HEX	#173A56
RGB	rgb(23, 58, 86)
HSL	hsl(207, 58%, 21%)
HSV	hsv(207, 73%, 34%)
CMYK	cmyk(73.3%, 32.6%, 0%, 66.3%)
CIE-LAB	lab(23.27, -2.20, -20.57)
CIE-LCH	lch(23.27, 20.69, 263.89°)
OKLab	oklab(33.72% -0.0265 -0.0581)
OKLCH	oklch(33.72% 0.064 245.5)
XYZ	xyz(3.5455, 3.8798, 9.3643)
Luminance	0.0388 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A56 #563317

analogous

#175653 #173A56 #171B56

triadic

#173A56 #56173A #3A5617

tetradic

#173A56 #531756 #563317 #1B5617

square

#173A56 #531756 #563317 #1B5617

split-complementary

#173A56 #56171B #565317

monochromatic

#061018 #0A1926 #173A56 #245B86 #317BB7

Accessibility & contrast

On white

11.82

#173A56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#173A56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A56

11.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A56	#FFFFFF	#000000	##FFFFFF
##173A56	1.00	11.82	1.78	11.82
#FFFFFF	11.82	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3B57

Deuteranopia (green-blind)

#253555

Tritanopia (blue-blind)

#004144

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173a56;
/* rgb */ color: rgb(23, 58, 86);
/* oklch */ color: oklch(33.7% 0.064 245.5);

Tailwind

colors: {
  custom: {
    50: '#5c6f85',
    500: '#173a56',
    950: '#000000',
  },
}

SCSS

$custom: #173a56;
$custom-light: #5c6f85;
$custom-dark: #000000;

JSON

{
  "hex": "#173a56",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 86
  },
  "hsl": {
    "h": 206.667,
    "s": 57.798,
    "l": 21.373
  },
  "oklch": {
    "l": 0.33722,
    "c": 0.06388,
    "h": 245.5
  },
  "luminance": 0.0388
}

Semantic roles & 50–950 ramp

primary

#173A56

secondary

#8D603C

accent

#8B47E1

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04070B

muted

#797A7C

Preview Lab

Preview with #173A56

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

Preview Lab → · Contrast checker → · Palette generator →