#173B58#173B58

#173B58 is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.1% C 0.066 H 245.8°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#173B58
RGB	rgb(23, 59, 88)
HSL	hsl(207, 59%, 22%)
HSV	hsv(207, 74%, 35%)
CMYK	cmyk(73.9%, 33%, 0%, 65.5%)
CIE-LAB	lab(23.72, -2.08, -21.18)
CIE-LCH	lch(23.72, 21.29, 264.39°)
OKLab	oklab(34.11% -0.0269 -0.0599)
OKLCH	oklch(34.11% 0.066 245.8)
XYZ	xyz(3.6781, 4.0143, 9.8116)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B58 #583417

analogous

#175855 #173B58 #171B58

triadic

#173B58 #58173B #3B5817

tetradic

#173B58 #551758 #583417 #1B5817

square

#173B58 #551758 #583417 #1B5817

split-complementary

#173B58 #58171B #585517

monochromatic

#061018 #0A1A27 #173B58 #245C89 #307CB9

Accessibility & contrast

On white

11.65

#173B58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#173B58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B58

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B58	#FFFFFF	#000000	##FFFFFF
##173B58	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3C59

Deuteranopia (green-blind)

#253657

Tritanopia (blue-blind)

#004245

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173b58;
/* rgb */ color: rgb(23, 59, 88);
/* oklch */ color: oklch(34.1% 0.066 245.8);

Tailwind

colors: {
  custom: {
    50: '#5d7087',
    500: '#173b58',
    950: '#000000',
  },
}

SCSS

$custom: #173b58;
$custom-light: #5d7087;
$custom-dark: #000000;

JSON

{
  "hex": "#173b58",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 88
  },
  "hsl": {
    "h": 206.769,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.34112,
    "c": 0.06567,
    "h": 245.8
  },
  "luminance": 0.04015
}

Semantic roles & 50–950 ramp

primary

#173B58

secondary

#8F613C

accent

#8C46E2

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173B58

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

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