#172A8F#172A8F

#172A8F is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.0% C 0.166 H 267.5°. Best body text is #FFFFFF at 11.90:1 contrast (WCAG AA passes).

Color values

HEX	#172A8F
RGB	rgb(23, 42, 143)
HSL	hsl(231, 72%, 33%)
HSV	hsv(231, 84%, 56%)
CMYK	cmyk(83.9%, 70.6%, 0%, 43.9%)
CIE-LAB	lab(23.07, 32.19, -57.35)
CIE-LCH	lch(23.07, 65.76, 299.31°)
OKLab	oklab(34.97% -0.0072 -0.1662)
OKLCH	oklch(34.97% 0.166 267.5)
XYZ	xyz(6.1375, 3.8205, 26.3952)
Luminance	0.0382 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A8F #8F7C17

analogous

#17668F #172A8F #40178F

triadic

#172A8F #8F172A #2A8F17

tetradic

#172A8F #8F1766 #8F7C17 #178F40

square

#172A8F #8F1766 #8F7C17 #178F40

split-complementary

#172A8F #8F4017 #668F17

monochromatic

#060B26 #0F1B5A #172A8F #1F39C4 #4059E0

Accessibility & contrast

On white

11.90

#172A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#172A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A8F

11.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A8F	#FFFFFF	#000000	##FFFFFF
##172A8F	1.00	11.90	1.76	11.90
#FFFFFF	11.90	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D92

Deuteranopia (green-blind)

#00318D

Tritanopia (blue-blind)

#004659

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #172a8f;
/* rgb */ color: rgb(23, 42, 143);
/* oklch */ color: oklch(35.0% 0.166 267.5);

Tailwind

colors: {
  custom: {
    50: '#6c63b1',
    500: '#172a8f',
    950: '#000000',
  },
}

SCSS

$custom: #172a8f;
$custom-light: #6c63b1;
$custom-dark: #000000;

JSON

{
  "hex": "#172a8f",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 143
  },
  "hsl": {
    "h": 230.5,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.34971,
    "c": 0.16633,
    "h": 267.5
  },
  "luminance": 0.03821
}

Semantic roles & 50–950 ramp

primary

#172A8F

secondary

#C1AD41

accent

#D239EF

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #172A8F

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

Preview Lab → · Contrast checker → · Palette generator →