#172D8F#172D8F

#172D8F is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.5% C 0.163 H 267.0°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#172D8F
RGB	rgb(23, 45, 143)
HSL	hsl(229, 72%, 33%)
HSV	hsv(229, 84%, 56%)
CMYK	cmyk(83.9%, 68.5%, 0%, 43.9%)
CIE-LAB	lab(23.81, 30.21, -56.13)
CIE-LCH	lch(23.81, 63.74, 298.29°)
OKLab	oklab(35.51% -0.0085 -0.1626)
OKLCH	oklch(35.51% 0.163 267)
XYZ	xyz(6.2479, 4.0414, 26.4320)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D8F #8F7917

analogous

#17698F #172D8F #3D178F

triadic

#172D8F #8F172D #2D8F17

tetradic

#172D8F #8F1769 #8F7917 #178F3D

square

#172D8F #8F1769 #8F7917 #178F3D

split-complementary

#172D8F #8F3D17 #698F17

monochromatic

#060C26 #0F1C5A #172D8F #1F3EC4 #405DE0

Accessibility & contrast

On white

11.61

#172D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#172D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D8F

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D8F	#FFFFFF	#000000	##FFFFFF
##172D8F	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E92

Deuteranopia (green-blind)

#00338D

Tritanopia (blue-blind)

#00485A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #172d8f;
/* rgb */ color: rgb(23, 45, 143);
/* oklch */ color: oklch(35.5% 0.163 267.0);

Tailwind

colors: {
  custom: {
    50: '#6c66b1',
    500: '#172d8f',
    950: '#000000',
  },
}

SCSS

$custom: #172d8f;
$custom-light: #6c66b1;
$custom-dark: #000000;

JSON

{
  "hex": "#172d8f",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 143
  },
  "hsl": {
    "h": 229,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.35509,
    "c": 0.16283,
    "h": 267
  },
  "luminance": 0.04042
}

Semantic roles & 50–950 ramp

primary

#172D8F

secondary

#C1A941

accent

#CE39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080511

muted

#7B7A80

Preview Lab

Preview with #172D8F

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

Preview Lab → · Contrast checker → · Palette generator →