#172A8D#172A8D

#172A8D is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.8% C 0.164 H 267.5°. Best body text is #FFFFFF at 11.98:1 contrast (WCAG AA passes).

Color values

HEX	#172A8D
RGB	rgb(23, 42, 141)
HSL	hsl(230, 72%, 32%)
HSV	hsv(230, 84%, 55%)
CMYK	cmyk(83.7%, 70.2%, 0%, 44.7%)
CIE-LAB	lab(22.86, 31.43, -56.44)
CIE-LCH	lch(22.86, 64.60, 299.11°)
OKLab	oklab(34.76% -0.007 -0.1635)
OKLCH	oklch(34.76% 0.164 267.5)
XYZ	xyz(5.9874, 3.7605, 25.6044)
Luminance	0.0376 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A8D #8D7A17

analogous

#17658D #172A8D #3F178D

triadic

#172A8D #8D172A #2A8D17

tetradic

#172A8D #8D1765 #8D7A17 #178D3F

square

#172A8D #8D1765 #8D7A17 #178D3F

split-complementary

#172A8D #8D3F17 #658D17

monochromatic

#060B24 #0E1A58 #172A8D #203AC2 #3F59E0

Accessibility & contrast

On white

11.98

#172A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#172A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A8D

11.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A8D	#FFFFFF	#000000	##FFFFFF
##172A8D	1.00	11.98	1.75	11.98
#FFFFFF	11.98	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C90

Deuteranopia (green-blind)

#00318B

Tritanopia (blue-blind)

#004558

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #172a8d;
/* rgb */ color: rgb(23, 42, 141);
/* oklch */ color: oklch(34.8% 0.164 267.5);

Tailwind

colors: {
  custom: {
    50: '#6c63af',
    500: '#172a8d',
    950: '#000000',
  },
}

SCSS

$custom: #172a8d;
$custom-light: #6c63af;
$custom-dark: #000000;

JSON

{
  "hex": "#172a8d",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 141
  },
  "hsl": {
    "h": 230.339,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.34759,
    "c": 0.16369,
    "h": 267.5
  },
  "luminance": 0.03761
}

Semantic roles & 50–950 ramp

primary

#172A8D

secondary

#C0AB40

accent

#D139EF

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080511

muted

#7B7980

Preview Lab

Preview with #172A8D

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

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