#172A74#172A74

#172A74 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.2% C 0.129 H 267.4°. Best body text is #FFFFFF at 12.96:1 contrast (WCAG AA passes).

Color values

HEX	#172A74
RGB	rgb(23, 42, 116)
HSL	hsl(228, 67%, 27%)
HSV	hsv(228, 80%, 45%)
CMYK	cmyk(80.2%, 63.8%, 0%, 54.5%)
CIE-LAB	lab(20.43, 21.57, -44.64)
CIE-LCH	lch(20.43, 49.58, 295.78°)
OKLab	oklab(32.23% -0.0059 -0.129)
OKLCH	oklch(32.23% 0.129 267.4)
XYZ	xyz(4.3326, 3.0986, 16.8893)
Luminance	0.0310 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A74 #746117

analogous

#175974 #172A74 #331774

triadic

#172A74 #74172A #2A7417

tetradic

#172A74 #741759 #746117 #177433

square

#172A74 #741759 #746117 #177433

split-complementary

#172A74 #743317 #597417

monochromatic

#05091A #0D1841 #172A74 #213CA7 #3052D6

Accessibility & contrast

On white

12.96

#172A74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#172A74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A74

12.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A74	#FFFFFF	#000000	##FFFFFF
##172A74	1.00	12.96	1.62	12.96
#FFFFFF	12.96	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003676

Deuteranopia (green-blind)

#002D73

Tritanopia (blue-blind)

#003D4A

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #172a74;
/* rgb */ color: rgb(23, 42, 116);
/* oklch */ color: oklch(32.2% 0.129 267.4);

Tailwind

colors: {
  custom: {
    50: '#65639d',
    500: '#172a74',
    950: '#000000',
  },
}

SCSS

$custom: #172a74;
$custom-light: #65639d;
$custom-dark: #000000;

JSON

{
  "hex": "#172a74",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 116
  },
  "hsl": {
    "h": 227.742,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.32234,
    "c": 0.12918,
    "h": 267.4
  },
  "luminance": 0.03099
}

Semantic roles & 50–950 ramp

primary

#172A74

secondary

#A9933D

accent

#C73EEA

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172A74

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

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