#172A78#172A78

#172A78 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.6% C 0.135 H 267.5°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#172A78
RGB	rgb(23, 42, 120)
HSL	hsl(228, 68%, 28%)
HSV	hsv(228, 81%, 47%)
CMYK	cmyk(80.8%, 65%, 0%, 52.9%)
CIE-LAB	lab(20.80, 23.18, -46.60)
CIE-LCH	lch(20.80, 52.05, 296.45°)
OKLab	oklab(32.62% -0.006 -0.1348)
OKLCH	oklch(32.62% 0.135 267.5)
XYZ	xyz(4.5703, 3.1936, 18.1412)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A78 #786517

analogous

#175A78 #172A78 #341778

triadic

#172A78 #78172A #2A7817

tetradic

#172A78 #78175A #786517 #177834

square

#172A78 #78175A #786517 #177834

split-complementary

#172A78 #783417 #5A7817

monochromatic

#05091A #0D1845 #172A78 #213CAB #3252D8

Accessibility & contrast

On white

12.81

#172A78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#172A78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A78

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A78	#FFFFFF	#000000	##FFFFFF
##172A78	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377B

Deuteranopia (green-blind)

#002E77

Tritanopia (blue-blind)

#003E4C

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #172a78;
/* rgb */ color: rgb(23, 42, 120);
/* oklch */ color: oklch(32.6% 0.135 267.5);

Tailwind

colors: {
  custom: {
    50: '#6663a0',
    500: '#172a78',
    950: '#000000',
  },
}

SCSS

$custom: #172a78;
$custom-light: #6663a0;
$custom-dark: #000000;

JSON

{
  "hex": "#172a78",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 120
  },
  "hsl": {
    "h": 228.247,
    "s": 67.832,
    "l": 28.039
  },
  "oklch": {
    "l": 0.32622,
    "c": 0.1349,
    "h": 267.5
  },
  "luminance": 0.03194
}

Semantic roles & 50–950 ramp

primary

#172A78

secondary

#AD973E

accent

#C93DEB

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050F

muted

#7A797E

Preview Lab

Preview with #172A78

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

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