#173C58#173C58

#173C58 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.4% C 0.065 H 244.3°. Best body text is #FFFFFF at 11.52:1 contrast (WCAG AA passes).

Color values

HEX	#173C58
RGB	rgb(23, 60, 88)
HSL	hsl(206, 59%, 22%)
HSV	hsv(206, 74%, 35%)
CMYK	cmyk(73.9%, 31.8%, 0%, 65.5%)
CIE-LAB	lab(24.06, -2.75, -20.65)
CIE-LCH	lch(24.06, 20.83, 262.41°)
OKLab	oklab(34.38% -0.0281 -0.0583)
OKLCH	oklch(34.38% 0.065 244.3)
XYZ	xyz(3.7300, 4.1181, 9.8289)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C58 #583317

analogous

#175854 #173C58 #171C58

triadic

#173C58 #58173C #3C5817

tetradic

#173C58 #541758 #583317 #1C5817

square

#173C58 #541758 #583317 #1C5817

split-complementary

#173C58 #58171C #585417

monochromatic

#061118 #0A1B27 #173C58 #245D89 #307EB9

Accessibility & contrast

On white

11.52

#173C58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173C58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C58

11.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C58	#FFFFFF	#000000	##FFFFFF
##173C58	1.00	11.52	1.82	11.52
#FFFFFF	11.52	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3D59

Deuteranopia (green-blind)

#263657

Tritanopia (blue-blind)

#004346

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173c58;
/* rgb */ color: rgb(23, 60, 88);
/* oklch */ color: oklch(34.4% 0.065 244.3);

Tailwind

colors: {
  custom: {
    50: '#5d7187',
    500: '#173c58',
    950: '#000000',
  },
}

SCSS

$custom: #173c58;
$custom-light: #5d7187;
$custom-dark: #000000;

JSON

{
  "hex": "#173c58",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 88
  },
  "hsl": {
    "h": 205.846,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.34379,
    "c": 0.06476,
    "h": 244.3
  },
  "luminance": 0.04118
}

Semantic roles & 50–950 ramp

primary

#173C58

secondary

#8F603C

accent

#8946E2

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173C58

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

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