#173E71#173E71

#173E71 is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.6% C 0.098 H 256.5°. Best body text is #FFFFFF at 10.69:1 contrast (WCAG AA passes).

Color values

HEX	#173E71
RGB	rgb(23, 62, 113)
HSL	hsl(214, 66%, 27%)
HSV	hsv(214, 80%, 44%)
CMYK	cmyk(79.6%, 45.1%, 0%, 55.7%)
CIE-LAB	lab(26.21, 6.09, -33.38)
CIE-LCH	lch(26.21, 33.93, 280.33°)
OKLab	oklab(36.55% -0.023 -0.0955)
OKLCH	oklch(36.55% 0.098 256.5)
XYZ	xyz(5.0555, 4.8191, 16.2833)
Luminance	0.0482 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E71 #714A17

analogous

#176B71 #173E71 #1D1771

triadic

#173E71 #71173E #3E7117

tetradic

#173E71 #71176B #714A17 #17711D

square

#173E71 #71176B #714A17 #17711D

split-complementary

#173E71 #711D17 #6B7117

monochromatic

#050E19 #0D223E #173E71 #215AA4 #2E76D4

Accessibility & contrast

On white

10.69

#173E71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#173E71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E71

10.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E71	#FFFFFF	#000000	##FFFFFF
##173E71	1.00	10.69	1.96	10.69
#FFFFFF	10.69	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254273

Deuteranopia (green-blind)

#143A70

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173e71;
/* rgb */ color: rgb(23, 62, 113);
/* oklch */ color: oklch(36.6% 0.098 256.5);

Tailwind

colors: {
  custom: {
    50: '#63729a',
    500: '#173e71',
    950: '#000000',
  },
}

SCSS

$custom: #173e71;
$custom-light: #63729a;
$custom-dark: #000000;

JSON

{
  "hex": "#173e71",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 113
  },
  "hsl": {
    "h": 214,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.36553,
    "c": 0.09827,
    "h": 256.5
  },
  "luminance": 0.0482
}

Semantic roles & 50–950 ramp

primary

#173E71

secondary

#A7793D

accent

#9F3FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173E71

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

Preview Lab → · Contrast checker → · Palette generator →