#173E58#173E58

#173E58 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.9% C 0.063 H 241.1°. Best body text is #FFFFFF at 11.25:1 contrast (WCAG AA passes).

Color values

HEX	#173E58
RGB	rgb(23, 62, 88)
HSL	hsl(204, 59%, 22%)
HSV	hsv(204, 74%, 35%)
CMYK	cmyk(73.9%, 29.5%, 0%, 65.5%)
CIE-LAB	lab(24.74, -4.08, -19.59)
CIE-LCH	lch(24.74, 20.01, 258.23°)
OKLab	oklab(34.92% -0.0304 -0.0552)
OKLCH	oklch(34.92% 0.063 241.1)
XYZ	xyz(3.8367, 4.3316, 9.8645)
Luminance	0.0433 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E58 #583117

analogous

#175852 #173E58 #171E58

triadic

#173E58 #58173E #3E5817

tetradic

#173E58 #521758 #583117 #1E5817

square

#173E58 #521758 #583117 #1E5817

split-complementary

#173E58 #58171E #585217

monochromatic

#061118 #0A1C27 #173E58 #246089 #3082B9

Accessibility & contrast

On white

11.25

#173E58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#173E58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E58

11.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E58	#FFFFFF	#000000	##FFFFFF
##173E58	1.00	11.25	1.87	11.25
#FFFFFF	11.25	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323E59

Deuteranopia (green-blind)

#293858

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173e58;
/* rgb */ color: rgb(23, 62, 88);
/* oklch */ color: oklch(34.9% 0.063 241.1);

Tailwind

colors: {
  custom: {
    50: '#5d7387',
    500: '#173e58',
    950: '#000000',
  },
}

SCSS

$custom: #173e58;
$custom-light: #5d7387;
$custom-dark: #000000;

JSON

{
  "hex": "#173e58",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 88
  },
  "hsl": {
    "h": 204,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.34918,
    "c": 0.06306,
    "h": 241.1
  },
  "luminance": 0.04332
}

Semantic roles & 50–950 ramp

primary

#173E58

secondary

#8F5D3C

accent

#8446E2

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #173E58

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

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