#172B72#172B72

#172B72 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.3% C 0.125 H 266.9°. Best body text is #FFFFFF at 12.92:1 contrast (WCAG AA passes).

Color values

HEX	#172B72
RGB	rgb(23, 43, 114)
HSL	hsl(227, 66%, 27%)
HSV	hsv(227, 80%, 45%)
CMYK	cmyk(79.8%, 62.3%, 0%, 55.3%)
CIE-LAB	lab(20.54, 20.04, -43.19)
CIE-LCH	lch(20.54, 47.61, 294.89°)
OKLab	oklab(32.25% -0.0067 -0.1248)
OKLCH	oklch(32.25% 0.125 266.9)
XYZ	xyz(4.2534, 3.1243, 16.2952)
Luminance	0.0313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B72 #725E17

analogous

#175972 #172B72 #311772

triadic

#172B72 #72172B #2B7217

tetradic

#172B72 #721759 #725E17 #177231

square

#172B72 #721759 #725E17 #177231

split-complementary

#172B72 #723117 #597217

monochromatic

#050A19 #0D183F #172B72 #213EA5 #2E53D5

Accessibility & contrast

On white

12.92

#172B72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#172B72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B72

12.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B72	#FFFFFF	#000000	##FFFFFF
##172B72	1.00	12.92	1.63	12.92
#FFFFFF	12.92	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003674

Deuteranopia (green-blind)

#002D71

Tritanopia (blue-blind)

#003D4A

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #172b72;
/* rgb */ color: rgb(23, 43, 114);
/* oklch */ color: oklch(32.3% 0.125 266.9);

Tailwind

colors: {
  custom: {
    50: '#64649b',
    500: '#172b72',
    950: '#000000',
  },
}

SCSS

$custom: #172b72;
$custom-light: #64649b;
$custom-dark: #000000;

JSON

{
  "hex": "#172b72",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 114
  },
  "hsl": {
    "h": 226.813,
    "s": 66.423,
    "l": 26.863
  },
  "oklch": {
    "l": 0.32253,
    "c": 0.12495,
    "h": 266.9
  },
  "luminance": 0.03125
}

Semantic roles & 50–950 ramp

primary

#172B72

secondary

#A8903D

accent

#C43EE9

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172B72

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

Preview Lab → · Contrast checker → · Palette generator →