#173E78#173E78

#173E78 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.109 H 258.5°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#173E78
RGB	rgb(23, 62, 120)
HSL	hsl(216, 68%, 28%)
HSV	hsv(216, 81%, 47%)
CMYK	cmyk(80.8%, 48.3%, 0%, 52.9%)
CIE-LAB	lab(26.69, 8.99, -37.06)
CIE-LCH	lch(26.69, 38.13, 283.64°)
OKLab	oklab(37.07% -0.0216 -0.1063)
OKLCH	oklch(37.07% 0.109 258.5)
XYZ	xyz(5.4649, 4.9828, 18.4394)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E78 #785117

analogous

#176E78 #173E78 #201778

triadic

#173E78 #78173E #3E7817

tetradic

#173E78 #78176E #785117 #177820

square

#173E78 #78176E #785117 #177820

split-complementary

#173E78 #782017 #6E7817

monochromatic

#050D1A #0D2345 #173E78 #2159AB #3274D8

Accessibility & contrast

On white

10.52

#173E78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#173E78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E78

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E78	#FFFFFF	#000000	##FFFFFF
##173E78	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F447A

Deuteranopia (green-blind)

#063B77

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173e78;
/* rgb */ color: rgb(23, 62, 120);
/* oklch */ color: oklch(37.1% 0.109 258.5);

Tailwind

colors: {
  custom: {
    50: '#64729f',
    500: '#173e78',
    950: '#000000',
  },
}

SCSS

$custom: #173e78;
$custom-light: #64729f;
$custom-dark: #000000;

JSON

{
  "hex": "#173e78",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 120
  },
  "hsl": {
    "h": 215.876,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.37071,
    "c": 0.10852,
    "h": 258.5
  },
  "luminance": 0.04983
}

Semantic roles & 50–950 ramp

primary

#173E78

secondary

#AD803E

accent

#A53DEB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173E78

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

Preview Lab → · Contrast checker → · Palette generator →