#172F8D#172F8D

#172F8D is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.7% C 0.158 H 266.6°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#172F8D
RGB	rgb(23, 47, 141)
HSL	hsl(228, 72%, 32%)
HSV	hsv(228, 84%, 55%)
CMYK	cmyk(83.7%, 66.7%, 0%, 44.7%)
CIE-LAB	lab(24.12, 28.08, -54.37)
CIE-LCH	lch(24.12, 61.20, 297.31°)
OKLab	oklab(35.68% -0.0094 -0.1575)
OKLCH	oklch(35.68% 0.158 266.6)
XYZ	xyz(6.1759, 4.1375, 25.6673)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F8D #8D7517

analogous

#176A8D #172F8D #3A178D

triadic

#172F8D #8D172F #2F8D17

tetradic

#172F8D #8D176A #8D7517 #178D3A

square

#172F8D #8D176A #8D7517 #178D3A

split-complementary

#172F8D #8D3A17 #6A8D17

monochromatic

#060C24 #0E1D58 #172F8D #2041C2 #3F5FE0

Accessibility & contrast

On white

11.49

#172F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#172F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F8D

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F8D	#FFFFFF	#000000	##FFFFFF
##172F8D	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F90

Deuteranopia (green-blind)

#00348B

Tritanopia (blue-blind)

#004859

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #172f8d;
/* rgb */ color: rgb(23, 47, 141);
/* oklch */ color: oklch(35.7% 0.158 266.6);

Tailwind

colors: {
  custom: {
    50: '#6b67af',
    500: '#172f8d',
    950: '#000000',
  },
}

SCSS

$custom: #172f8d;
$custom-light: #6b67af;
$custom-dark: #000000;

JSON

{
  "hex": "#172f8d",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 141
  },
  "hsl": {
    "h": 227.797,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.35679,
    "c": 0.15775,
    "h": 266.6
  },
  "luminance": 0.04138
}

Semantic roles & 50–950 ramp

primary

#172F8D

secondary

#C0A640

accent

#CA39EF

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #172F8D

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

Preview Lab → · Contrast checker → · Palette generator →