#172D8E#172D8E

#172D8E is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.4% C 0.162 H 267.0°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#172D8E
RGB	rgb(23, 45, 142)
HSL	hsl(229, 72%, 32%)
HSV	hsv(229, 84%, 56%)
CMYK	cmyk(83.8%, 68.3%, 0%, 44.3%)
CIE-LAB	lab(23.71, 29.82, -55.67)
CIE-LCH	lch(23.71, 63.16, 298.17°)
OKLab	oklab(35.41% -0.0085 -0.1613)
OKLCH	oklch(35.41% 0.162 267)
XYZ	xyz(6.1725, 4.0112, 26.0349)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D8E #8E7817

analogous

#17688E #172D8E #3D178E

triadic

#172D8E #8E172D #2D8E17

tetradic

#172D8E #8E1768 #8E7817 #178E3D

square

#172D8E #8E1768 #8E7817 #178E3D

split-complementary

#172D8E #8E3D17 #688E17

monochromatic

#060C25 #0E1C59 #172D8E #203EC3 #3F5DE0

Accessibility & contrast

On white

11.65

#172D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#172D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D8E

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D8E	#FFFFFF	#000000	##FFFFFF
##172D8E	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E91

Deuteranopia (green-blind)

#00338C

Tritanopia (blue-blind)

#004759

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #172d8e;
/* rgb */ color: rgb(23, 45, 142);
/* oklch */ color: oklch(35.4% 0.162 267.0);

Tailwind

colors: {
  custom: {
    50: '#6c66b0',
    500: '#172d8e',
    950: '#000000',
  },
}

SCSS

$custom: #172d8e;
$custom-light: #6c66b0;
$custom-dark: #000000;

JSON

{
  "hex": "#172d8e",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 142
  },
  "hsl": {
    "h": 228.908,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.35406,
    "c": 0.1615,
    "h": 267
  },
  "luminance": 0.04012
}

Semantic roles & 50–950 ramp

primary

#172D8E

secondary

#C0A940

accent

#CD39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080511

muted

#7B7A80

Preview Lab

Preview with #172D8E

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

Preview Lab → · Contrast checker → · Palette generator →