#172A7A#172A7A

#172A7A is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.8% C 0.138 H 267.5°. Best body text is #FFFFFF at 12.74:1 contrast (WCAG AA passes).

Color values

HEX	#172A7A
RGB	rgb(23, 42, 122)
HSL	hsl(228, 68%, 28%)
HSV	hsv(228, 81%, 48%)
CMYK	cmyk(81.1%, 65.6%, 0%, 52.2%)
CIE-LAB	lab(20.99, 23.99, -47.57)
CIE-LCH	lch(20.99, 53.27, 296.76°)
OKLab	oklab(32.82% -0.006 -0.1376)
OKLCH	oklch(32.82% 0.138 267.5)
XYZ	xyz(4.6929, 3.2427, 18.7871)
Luminance	0.0324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A7A #7A6717

analogous

#175B7A #172A7A #35177A

triadic

#172A7A #7A172A #2A7A17

tetradic

#172A7A #7A175B #7A6717 #177A35

square

#172A7A #7A175B #7A6717 #177A35

split-complementary

#172A7A #7A3517 #5B7A17

monochromatic

#05091A #0D1847 #172A7A #213CAD #3353D9

Accessibility & contrast

On white

12.74

#172A7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#172A7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A7A

12.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A7A	#FFFFFF	#000000	##FFFFFF
##172A7A	1.00	12.74	1.65	12.74
#FFFFFF	12.74	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377D

Deuteranopia (green-blind)

#002E78

Tritanopia (blue-blind)

#003F4D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #172a7a;
/* rgb */ color: rgb(23, 42, 122);
/* oklch */ color: oklch(32.8% 0.138 267.5);

Tailwind

colors: {
  custom: {
    50: '#6663a1',
    500: '#172a7a',
    950: '#000000',
  },
}

SCSS

$custom: #172a7a;
$custom-light: #6663a1;
$custom-dark: #000000;

JSON

{
  "hex": "#172a7a",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 122
  },
  "hsl": {
    "h": 228.485,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.32818,
    "c": 0.13773,
    "h": 267.5
  },
  "luminance": 0.03243
}

Semantic roles & 50–950 ramp

primary

#172A7A

secondary

#AF993E

accent

#CA3DEB

background

#F6F5FA

surface

#EBEAF3

border

#C6C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #172A7A

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

Preview Lab → · Contrast checker → · Palette generator →