#172F90#172F90

#172F90 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 36.0% C 0.162 H 266.6°. Best body text is #FFFFFF at 11.38:1 contrast (WCAG AA passes).

Color values

HEX	#172F90
RGB	rgb(23, 47, 144)
HSL	hsl(228, 72%, 33%)
HSV	hsv(228, 84%, 56%)
CMYK	cmyk(84%, 67.4%, 0%, 43.5%)
CIE-LAB	lab(24.41, 29.25, -55.76)
CIE-LCH	lch(24.41, 62.96, 297.68°)
OKLab	oklab(35.98% -0.0096 -0.1615)
OKLCH	oklch(35.98% 0.162 266.6)
XYZ	xyz(6.4021, 4.2280, 26.8588)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F90 #907817

analogous

#176B90 #172F90 #3B1790

triadic

#172F90 #90172F #2F9017

tetradic

#172F90 #90176B #907817 #17903B

square

#172F90 #90176B #907817 #17903B

split-complementary

#172F90 #903B17 #6B9017

monochromatic

#060D26 #0F1E5B #172F90 #1F40C5 #4160E1

Accessibility & contrast

On white

11.38

#172F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#172F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F90

11.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F90	#FFFFFF	#000000	##FFFFFF
##172F90	1.00	11.38	1.85	11.38
#FFFFFF	11.38	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004093

Deuteranopia (green-blind)

#00348E

Tritanopia (blue-blind)

#00495B

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #172f90;
/* rgb */ color: rgb(23, 47, 144);
/* oklch */ color: oklch(36.0% 0.162 266.6);

Tailwind

colors: {
  custom: {
    50: '#6c67b1',
    500: '#172f90',
    950: '#000000',
  },
}

SCSS

$custom: #172f90;
$custom-light: #6c67b1;
$custom-dark: #000000;

JSON

{
  "hex": "#172f90",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 144
  },
  "hsl": {
    "h": 228.099,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.35981,
    "c": 0.16179,
    "h": 266.6
  },
  "luminance": 0.04229
}

Semantic roles & 50–950 ramp

primary

#172F90

secondary

#C1A842

accent

#CB39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #172F90

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

Preview Lab → · Contrast checker → · Palette generator →