#172D78#172D78

#172D78 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.2% C 0.131 H 266.5°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#172D78
RGB	rgb(23, 45, 120)
HSL	hsl(226, 68%, 28%)
HSV	hsv(226, 81%, 47%)
CMYK	cmyk(80.8%, 62.5%, 0%, 52.9%)
CIE-LAB	lab(21.63, 21.06, -45.24)
CIE-LCH	lch(21.63, 49.90, 294.96°)
OKLab	oklab(33.24% -0.008 -0.1307)
OKLCH	oklch(33.24% 0.131 266.5)
XYZ	xyz(4.6807, 3.4145, 18.1780)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D78 #786217

analogous

#175D78 #172D78 #321778

triadic

#172D78 #78172D #2D7817

tetradic

#172D78 #78175D #786217 #177832

square

#172D78 #78175D #786217 #177832

split-complementary

#172D78 #783217 #5D7817

monochromatic

#050A1A #0D1A45 #172D78 #2140AB #3257D8

Accessibility & contrast

On white

12.48

#172D78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#172D78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D78

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D78	#FFFFFF	#000000	##FFFFFF
##172D78	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00397A

Deuteranopia (green-blind)

#002F77

Tritanopia (blue-blind)

#00404E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172d78;
/* rgb */ color: rgb(23, 45, 120);
/* oklch */ color: oklch(33.2% 0.131 266.5);

Tailwind

colors: {
  custom: {
    50: '#6565a0',
    500: '#172d78',
    950: '#000000',
  },
}

SCSS

$custom: #172d78;
$custom-light: #6565a0;
$custom-dark: #000000;

JSON

{
  "hex": "#172d78",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 120
  },
  "hsl": {
    "h": 226.392,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.33237,
    "c": 0.13099,
    "h": 266.5
  },
  "luminance": 0.03415
}

Semantic roles & 50–950 ramp

primary

#172D78

secondary

#AD943E

accent

#C33DEB

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07050F

muted

#7A7A7E

Preview Lab

Preview with #172D78

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

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