#173A58#173A58

#173A58 is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.8% C 0.067 H 247.2°. Best body text is #FFFFFF at 11.78:1 contrast (WCAG AA passes).

Color values

HEX	#173A58
RGB	rgb(23, 58, 88)
HSL	hsl(208, 59%, 22%)
HSV	hsv(208, 74%, 35%)
CMYK	cmyk(73.9%, 34.1%, 0%, 65.5%)
CIE-LAB	lab(23.38, -1.40, -21.72)
CIE-LCH	lch(23.38, 21.76, 266.30°)
OKLab	oklab(33.85% -0.0258 -0.0615)
OKLCH	oklch(33.85% 0.067 247.2)
XYZ	xyz(3.6272, 3.9125, 9.7946)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A58 #583517

analogous

#175856 #173A58 #171A58

triadic

#173A58 #58173A #3A5817

tetradic

#173A58 #561758 #583517 #1A5817

square

#173A58 #561758 #583517 #1A5817

split-complementary

#173A58 #58171A #585617

monochromatic

#061018 #0A1A27 #173A58 #245A89 #307AB9

Accessibility & contrast

On white

11.78

#173A58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#173A58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A58

11.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A58	#FFFFFF	#000000	##FFFFFF
##173A58	1.00	11.78	1.78	11.78
#FFFFFF	11.78	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3B59

Deuteranopia (green-blind)

#243557

Tritanopia (blue-blind)

#004145

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173a58;
/* rgb */ color: rgb(23, 58, 88);
/* oklch */ color: oklch(33.8% 0.067 247.2);

Tailwind

colors: {
  custom: {
    50: '#5d6f87',
    500: '#173a58',
    950: '#000000',
  },
}

SCSS

$custom: #173a58;
$custom-light: #5d6f87;
$custom-dark: #000000;

JSON

{
  "hex": "#173a58",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 88
  },
  "hsl": {
    "h": 207.692,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.33845,
    "c": 0.06665,
    "h": 247.2
  },
  "luminance": 0.03913
}

Semantic roles & 50–950 ramp

primary

#173A58

secondary

#8F623C

accent

#8E46E2

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173A58

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

Preview Lab → · Contrast checker → · Palette generator →