#173F72#173F72

#173F72 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 36.9% C 0.098 H 256.1°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#173F72
RGB	rgb(23, 63, 114)
HSL	hsl(214, 66%, 27%)
HSV	hsv(214, 80%, 45%)
CMYK	cmyk(79.8%, 44.7%, 0%, 55.3%)
CIE-LAB	lab(26.60, 5.81, -33.40)
CIE-LCH	lch(26.60, 33.90, 279.86°)
OKLab	oklab(36.87% -0.0237 -0.0956)
OKLCH	oklch(36.87% 0.098 256.1)
XYZ	xyz(5.1670, 4.9515, 16.5997)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F72 #724A17

analogous

#176D72 #173F72 #1C1772

triadic

#173F72 #72173F #3F7217

tetradic

#173F72 #72176D #724A17 #17721C

square

#173F72 #72176D #724A17 #17721C

split-complementary

#173F72 #721C17 #6D7217

monochromatic

#050E19 #0D233F #173F72 #215BA5 #2E78D5

Accessibility & contrast

On white

10.55

#173F72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#173F72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F72

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F72	#FFFFFF	#000000	##FFFFFF
##173F72	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264374

Deuteranopia (green-blind)

#153B71

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173f72;
/* rgb */ color: rgb(23, 63, 114);
/* oklch */ color: oklch(36.9% 0.098 256.1);

Tailwind

colors: {
  custom: {
    50: '#63739b',
    500: '#173f72',
    950: '#000000',
  },
}

SCSS

$custom: #173f72;
$custom-light: #63739b;
$custom-dark: #000000;

JSON

{
  "hex": "#173f72",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 114
  },
  "hsl": {
    "h": 213.626,
    "s": 66.423,
    "l": 26.863
  },
  "oklch": {
    "l": 0.36872,
    "c": 0.09849,
    "h": 256.1
  },
  "luminance": 0.04952
}

Semantic roles & 50–950 ramp

primary

#173F72

secondary

#A8793D

accent

#9E3EE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173F72

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

Preview Lab → · Contrast checker → · Palette generator →