#173F73#173F73

#173F73 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 36.9% C 0.100 H 256.4°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#173F73
RGB	rgb(23, 63, 115)
HSL	hsl(214, 67%, 27%)
HSV	hsv(214, 80%, 45%)
CMYK	cmyk(80%, 45.2%, 0%, 54.9%)
CIE-LAB	lab(26.66, 6.22, -33.93)
CIE-LCH	lch(26.66, 34.50, 280.39°)
OKLab	oklab(36.94% -0.0235 -0.0971)
OKLCH	oklch(36.94% 0.1 256.4)
XYZ	xyz(5.2242, 4.9744, 16.9011)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F73 #734B17

analogous

#176D73 #173F73 #1D1773

triadic

#173F73 #73173F #3F7317

tetradic

#173F73 #73176D #734B17 #17731D

square

#173F73 #73176D #734B17 #17731D

split-complementary

#173F73 #731D17 #6D7317

monochromatic

#050E1A #0D2340 #173F73 #215BA6 #2F77D5

Accessibility & contrast

On white

10.53

#173F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#173F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F73

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F73	#FFFFFF	#000000	##FFFFFF
##173F73	1.00	10.53	2.00	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254475

Deuteranopia (green-blind)

#143B72

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173f73;
/* rgb */ color: rgb(23, 63, 115);
/* oklch */ color: oklch(36.9% 0.100 256.4);

Tailwind

colors: {
  custom: {
    50: '#63739c',
    500: '#173f73',
    950: '#000000',
  },
}

SCSS

$custom: #173f73;
$custom-light: #63739c;
$custom-dark: #000000;

JSON

{
  "hex": "#173f73",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 115
  },
  "hsl": {
    "h": 213.913,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.36944,
    "c": 0.09995,
    "h": 256.4
  },
  "luminance": 0.04975
}

Semantic roles & 50–950 ramp

primary

#173F73

secondary

#A97A3D

accent

#9F3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173F73

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

Preview Lab → · Contrast checker → · Palette generator →