#173F55#173F55

#173F55 is a dark, muted cyan. Relative luminance 0.044; OKLCH L 35.0% C 0.059 H 236.0°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#173F55
RGB	rgb(23, 63, 85)
HSL	hsl(201, 57%, 21%)
HSV	hsv(201, 73%, 33%)
CMYK	cmyk(72.9%, 25.9%, 0%, 66.7%)
CIE-LAB	lab(24.93, -5.90, -17.33)
CIE-LCH	lch(24.93, 18.30, 251.19°)
OKLab	oklab(35.02% -0.0328 -0.0487)
OKLCH	oklch(35.02% 0.059 236)
XYZ	xyz(3.7699, 4.3926, 9.2418)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F55 #552D17

analogous

#17554C #173F55 #172055

triadic

#173F55 #55173F #3F5517

tetradic

#173F55 #4C1755 #552D17 #205517

square

#173F55 #4C1755 #552D17 #205517

split-complementary

#173F55 #551720 #554C17

monochromatic

#071218 #0A1B25 #173F55 #246385 #3186B5

Accessibility & contrast

On white

11.18

#173F55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#173F55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F55

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F55	#FFFFFF	#000000	##FFFFFF
##173F55	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353F56

Deuteranopia (green-blind)

#2C3855

Tritanopia (blue-blind)

#004546

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173f55;
/* rgb */ color: rgb(23, 63, 85);
/* oklch */ color: oklch(35.0% 0.059 236.0);

Tailwind

colors: {
  custom: {
    50: '#5c7485',
    500: '#173f55',
    950: '#000000',
  },
}

SCSS

$custom: #173f55;
$custom-light: #5c7485;
$custom-dark: #000000;

JSON

{
  "hex": "#173f55",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 85
  },
  "hsl": {
    "h": 201.29,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.35019,
    "c": 0.05869,
    "h": 236
  },
  "luminance": 0.04393
}

Semantic roles & 50–950 ramp

primary

#173F55

secondary

#8C583C

accent

#7E47E1

background

#F5F7F8

surface

#E9EDEF

border

#C5C8CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #173F55

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

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