#173A59#173A59

#173A59 is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.9% C 0.068 H 248.0°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#173A59
RGB	rgb(23, 58, 89)
HSL	hsl(208, 59%, 22%)
HSV	hsv(208, 74%, 35%)
CMYK	cmyk(74.2%, 34.8%, 0%, 65.1%)
CIE-LAB	lab(23.44, -1.00, -22.29)
CIE-LCH	lch(23.44, 22.31, 267.43°)
OKLab	oklab(33.91% -0.0254 -0.0631)
OKLCH	oklch(33.91% 0.068 248)
XYZ	xyz(3.6689, 3.9291, 10.0143)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A59 #593617

analogous

#175957 #173A59 #171959

triadic

#173A59 #59173A #3A5917

tetradic

#173A59 #571759 #593617 #195917

square

#173A59 #571759 #593617 #195917

split-complementary

#173A59 #591719 #595717

monochromatic

#061018 #0A1A28 #173A59 #245A8A #3079BA

Accessibility & contrast

On white

11.76

#173A59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#173A59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A59

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A59	#FFFFFF	#000000	##FFFFFF
##173A59	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3B5A

Deuteranopia (green-blind)

#233558

Tritanopia (blue-blind)

#004145

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173a59;
/* rgb */ color: rgb(23, 58, 89);
/* oklch */ color: oklch(33.9% 0.068 248.0);

Tailwind

colors: {
  custom: {
    50: '#5d6f88',
    500: '#173a59',
    950: '#000000',
  },
}

SCSS

$custom: #173a59;
$custom-light: #5d6f88;
$custom-dark: #000000;

JSON

{
  "hex": "#173a59",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 89
  },
  "hsl": {
    "h": 208.182,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.33907,
    "c": 0.06805,
    "h": 248
  },
  "luminance": 0.0393
}

Semantic roles & 50–950 ramp

primary

#173A59

secondary

#90633C

accent

#8F46E2

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173A59

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

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