#172B73#172B73

#172B73 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.3% C 0.126 H 267.0°. Best body text is #FFFFFF at 12.89:1 contrast (WCAG AA passes).

Color values

HEX	#172B73
RGB	rgb(23, 43, 115)
HSL	hsl(227, 67%, 27%)
HSV	hsv(227, 80%, 45%)
CMYK	cmyk(80%, 62.6%, 0%, 54.9%)
CIE-LAB	lab(20.62, 20.45, -43.69)
CIE-LCH	lch(20.62, 48.24, 295.08°)
OKLab	oklab(32.35% -0.0066 -0.1262)
OKLCH	oklch(32.35% 0.126 267)
XYZ	xyz(4.3107, 3.1472, 16.5966)
Luminance	0.0315 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B73 #735F17

analogous

#175973 #172B73 #311773

triadic

#172B73 #73172B #2B7317

tetradic

#172B73 #731759 #735F17 #177331

square

#172B73 #731759 #735F17 #177331

split-complementary

#172B73 #733117 #597317

monochromatic

#050A1A #0D1840 #172B73 #213EA6 #2F53D5

Accessibility & contrast

On white

12.89

#172B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#172B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B73

12.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B73	#FFFFFF	#000000	##FFFFFF
##172B73	1.00	12.89	1.63	12.89
#FFFFFF	12.89	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003675

Deuteranopia (green-blind)

#002D72

Tritanopia (blue-blind)

#003D4A

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #172b73;
/* rgb */ color: rgb(23, 43, 115);
/* oklch */ color: oklch(32.3% 0.126 267.0);

Tailwind

colors: {
  custom: {
    50: '#64649c',
    500: '#172b73',
    950: '#000000',
  },
}

SCSS

$custom: #172b73;
$custom-light: #64649c;
$custom-dark: #000000;

JSON

{
  "hex": "#172b73",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 115
  },
  "hsl": {
    "h": 226.957,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.32347,
    "c": 0.1264,
    "h": 267
  },
  "luminance": 0.03148
}

Semantic roles & 50–950 ramp

primary

#172B73

secondary

#A9913D

accent

#C43EEA

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172B73

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

Preview Lab → · Contrast checker → · Palette generator →