#172A71#172A71

#172A71 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 31.9% C 0.125 H 267.3°. Best body text is #FFFFFF at 13.08:1 contrast (WCAG AA passes).

Color values

HEX	#172A71
RGB	rgb(23, 42, 113)
HSL	hsl(227, 66%, 27%)
HSV	hsv(227, 80%, 44%)
CMYK	cmyk(79.6%, 62.8%, 0%, 55.7%)
CIE-LAB	lab(20.16, 20.34, -43.16)
CIE-LCH	lch(20.16, 47.71, 295.24°)
OKLab	oklab(31.95% -0.0059 -0.1247)
OKLCH	oklch(31.95% 0.125 267.3)
XYZ	xyz(4.1609, 3.0299, 15.9851)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A71 #715E17

analogous

#175771 #172A71 #311771

triadic

#172A71 #71172A #2A7117

tetradic

#172A71 #711757 #715E17 #177131

square

#172A71 #711757 #715E17 #177131

split-complementary

#172A71 #713117 #577117

monochromatic

#050919 #0D173E #172A71 #213DA4 #2E51D4

Accessibility & contrast

On white

13.08

#172A71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#172A71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A71

13.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A71	#FFFFFF	#000000	##FFFFFF
##172A71	1.00	13.08	1.61	13.08
#FFFFFF	13.08	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003573

Deuteranopia (green-blind)

#002D70

Tritanopia (blue-blind)

#003C49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #172a71;
/* rgb */ color: rgb(23, 42, 113);
/* oklch */ color: oklch(31.9% 0.125 267.3);

Tailwind

colors: {
  custom: {
    50: '#64639a',
    500: '#172a71',
    950: '#000000',
  },
}

SCSS

$custom: #172a71;
$custom-light: #64639a;
$custom-dark: #000000;

JSON

{
  "hex": "#172a71",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 113
  },
  "hsl": {
    "h": 227.333,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.31948,
    "c": 0.12482,
    "h": 267.3
  },
  "luminance": 0.0303
}

Semantic roles & 50–950 ramp

primary

#172A71

secondary

#A7903D

accent

#C53FE9

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172A71

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

Preview Lab → · Contrast checker → · Palette generator →