#172B74#172B74

#172B74 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.4% C 0.128 H 267.0°. Best body text is #FFFFFF at 12.85:1 contrast (WCAG AA passes).

Color values

HEX	#172B74
RGB	rgb(23, 43, 116)
HSL	hsl(227, 67%, 27%)
HSV	hsv(227, 80%, 45%)
CMYK	cmyk(80.2%, 62.9%, 0%, 54.5%)
CIE-LAB	lab(20.71, 20.85, -44.19)
CIE-LCH	lch(20.71, 48.86, 295.26°)
OKLab	oklab(32.44% -0.0066 -0.1277)
OKLCH	oklch(32.44% 0.128 267)
XYZ	xyz(4.3685, 3.1704, 16.9013)
Luminance	0.0317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B74 #746017

analogous

#175974 #172B74 #321774

triadic

#172B74 #74172B #2B7417

tetradic

#172B74 #741759 #746017 #177432

square

#172B74 #741759 #746017 #177432

split-complementary

#172B74 #743217 #597417

monochromatic

#05091A #0D1841 #172B74 #213EA7 #3053D6

Accessibility & contrast

On white

12.85

#172B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#172B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B74

12.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B74	#FFFFFF	#000000	##FFFFFF
##172B74	1.00	12.85	1.63	12.85
#FFFFFF	12.85	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003676

Deuteranopia (green-blind)

#002E73

Tritanopia (blue-blind)

#003E4B

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #172b74;
/* rgb */ color: rgb(23, 43, 116);
/* oklch */ color: oklch(32.4% 0.128 267.0);

Tailwind

colors: {
  custom: {
    50: '#64649d',
    500: '#172b74',
    950: '#000000',
  },
}

SCSS

$custom: #172b74;
$custom-light: #64649d;
$custom-dark: #000000;

JSON

{
  "hex": "#172b74",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 116
  },
  "hsl": {
    "h": 227.097,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.32442,
    "c": 0.12785,
    "h": 267
  },
  "luminance": 0.03171
}

Semantic roles & 50–950 ramp

primary

#172B74

secondary

#A9923D

accent

#C53EEA

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172B74

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

Preview Lab → · Contrast checker → · Palette generator →