#172A73#172A73

#172A73 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.1% C 0.128 H 267.3°. Best body text is #FFFFFF at 13.00:1 contrast (WCAG AA passes).

Color values

HEX	#172A73
RGB	rgb(23, 42, 115)
HSL	hsl(228, 67%, 27%)
HSV	hsv(228, 80%, 45%)
CMYK	cmyk(80%, 63.5%, 0%, 54.9%)
CIE-LAB	lab(20.34, 21.16, -44.15)
CIE-LCH	lch(20.34, 48.96, 295.61°)
OKLab	oklab(32.14% -0.0059 -0.1276)
OKLCH	oklch(32.14% 0.128 267.3)
XYZ	xyz(4.2747, 3.0754, 16.5847)
Luminance	0.0308 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A73 #736017

analogous

#175873 #172A73 #321773

triadic

#172A73 #73172A #2A7317

tetradic

#172A73 #731758 #736017 #177332

square

#172A73 #731758 #736017 #177332

split-complementary

#172A73 #733217 #587317

monochromatic

#05091A #0D1740 #172A73 #213DA6 #2F51D5

Accessibility & contrast

On white

13.00

#172A73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#172A73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A73

13.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A73	#FFFFFF	#000000	##FFFFFF
##172A73	1.00	13.00	1.62	13.00
#FFFFFF	13.00	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	13.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003575

Deuteranopia (green-blind)

#002D72

Tritanopia (blue-blind)

#003D4A

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #172a73;
/* rgb */ color: rgb(23, 42, 115);
/* oklch */ color: oklch(32.1% 0.128 267.3);

Tailwind

colors: {
  custom: {
    50: '#64639c',
    500: '#172a73',
    950: '#000000',
  },
}

SCSS

$custom: #172a73;
$custom-light: #64639c;
$custom-dark: #000000;

JSON

{
  "hex": "#172a73",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 115
  },
  "hsl": {
    "h": 227.609,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.32138,
    "c": 0.12773,
    "h": 267.3
  },
  "luminance": 0.03076
}

Semantic roles & 50–950 ramp

primary

#172A73

secondary

#A9923D

accent

#C63EEA

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172A73

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

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