#172D83#172D83

#172D83 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.3% C 0.147 H 266.9°. Best body text is #FFFFFF at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#172D83
RGB	rgb(23, 45, 131)
HSL	hsl(228, 70%, 30%)
HSV	hsv(228, 82%, 51%)
CMYK	cmyk(82.4%, 65.6%, 0%, 48.6%)
CIE-LAB	lab(22.64, 25.50, -50.55)
CIE-LCH	lch(22.64, 56.62, 296.76°)
OKLab	oklab(34.3% -0.008 -0.1463)
OKLCH	oklch(34.3% 0.147 266.9)
XYZ	xyz(5.3870, 3.6970, 21.8980)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D83 #836D17

analogous

#176383 #172D83 #371783

triadic

#172D83 #83172D #2D8317

tetradic

#172D83 #831763 #836D17 #178337

square

#172D83 #831763 #836D17 #178337

split-complementary

#172D83 #833717 #638317

monochromatic

#05091B #0E1B4F #172D83 #203FB7 #385ADC

Accessibility & contrast

On white

12.07

#172D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#172D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D83

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D83	#FFFFFF	#000000	##FFFFFF
##172D83	1.00	12.07	1.74	12.07
#FFFFFF	12.07	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B86

Deuteranopia (green-blind)

#003181

Tritanopia (blue-blind)

#004453

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #172d83;
/* rgb */ color: rgb(23, 45, 131);
/* oklch */ color: oklch(34.3% 0.147 266.9);

Tailwind

colors: {
  custom: {
    50: '#6865a8',
    500: '#172d83',
    950: '#000000',
  },
}

SCSS

$custom: #172d83;
$custom-light: #6865a8;
$custom-dark: #000000;

JSON

{
  "hex": "#172d83",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 131
  },
  "hsl": {
    "h": 227.778,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.34299,
    "c": 0.14653,
    "h": 266.9
  },
  "luminance": 0.03698
}

Semantic roles & 50–950 ramp

primary

#172D83

secondary

#B79F3F

accent

#C93BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070510

muted

#7A7A7F

Preview Lab

Preview with #172D83

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

Preview Lab → · Contrast checker → · Palette generator →