#173E79#173E79

#173E79 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.110 H 258.8°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#173E79
RGB	rgb(23, 62, 121)
HSL	hsl(216, 68%, 28%)
HSV	hsv(216, 81%, 47%)
CMYK	cmyk(81%, 48.8%, 0%, 52.5%)
CIE-LAB	lab(26.76, 9.41, -37.57)
CIE-LCH	lch(26.76, 38.73, 284.06°)
OKLab	oklab(37.15% -0.0214 -0.1079)
OKLCH	oklch(37.15% 0.11 258.8)
XYZ	xyz(5.5259, 5.0072, 18.7607)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E79 #795217

analogous

#176F79 #173E79 #211779

triadic

#173E79 #79173E #3E7917

tetradic

#173E79 #79176F #795217 #177921

square

#173E79 #79176F #795217 #177921

split-complementary

#173E79 #792117 #6F7917

monochromatic

#050D1A #0D2446 #173E79 #2158AC #3274D8

Accessibility & contrast

On white

10.49

#173E79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#173E79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E79

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E79	#FFFFFF	#000000	##FFFFFF
##173E79	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E447B

Deuteranopia (green-blind)

#033B78

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173e79;
/* rgb */ color: rgb(23, 62, 121);
/* oklch */ color: oklch(37.1% 0.110 258.8);

Tailwind

colors: {
  custom: {
    50: '#6572a0',
    500: '#173e79',
    950: '#000000',
  },
}

SCSS

$custom: #173e79;
$custom-light: #6572a0;
$custom-dark: #000000;

JSON

{
  "hex": "#173e79",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 121
  },
  "hsl": {
    "h": 216.122,
    "s": 68.056,
    "l": 28.235
  },
  "oklch": {
    "l": 0.37147,
    "c": 0.10998,
    "h": 258.8
  },
  "luminance": 0.05008
}

Semantic roles & 50–950 ramp

primary

#173E79

secondary

#AE813E

accent

#A63DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080F

muted

#7A7B7E

Preview Lab

Preview with #173E79

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

Preview Lab → · Contrast checker → · Palette generator →