#171F90#171F90

#171F90 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.3% C 0.179 H 268.9°. Best body text is #FFFFFF at 12.84:1 contrast (WCAG AA passes).

Color values

HEX	#171F90
RGB	rgb(23, 31, 144)
HSL	hsl(236, 72%, 33%)
HSV	hsv(236, 84%, 56%)
CMYK	cmyk(84%, 78.5%, 0%, 43.5%)
CIE-LAB	lab(20.73, 39.37, -61.83)
CIE-LCH	lch(20.73, 73.30, 302.49°)
OKLab	oklab(33.33% -0.0034 -0.1791)
OKLCH	oklch(33.33% 0.179 268.9)
XYZ	xyz(5.8756, 3.1750, 26.6833)
Luminance	0.0318 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F90 #908817

analogous

#175B90 #171F90 #4B1790

triadic

#171F90 #90171F #1F9017

tetradic

#171F90 #90175B #908817 #17904B

square

#171F90 #90175B #908817 #17904B

split-complementary

#171F90 #904B17 #5B9017

monochromatic

#060826 #0F145B #171F90 #1F2AC5 #414BE1

Accessibility & contrast

On white

12.84

#171F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#171F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F90

12.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F90	#FFFFFF	#000000	##FFFFFF
##171F90	1.00	12.84	1.64	12.84
#FFFFFF	12.84	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003893

Deuteranopia (green-blind)

#002C8E

Tritanopia (blue-blind)

#004157

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #171f90;
/* rgb */ color: rgb(23, 31, 144);
/* oklch */ color: oklch(33.3% 0.179 268.9);

Tailwind

colors: {
  custom: {
    50: '#6e5cb2',
    500: '#171f90',
    950: '#000000',
  },
}

SCSS

$custom: #171f90;
$custom-light: #6e5cb2;
$custom-dark: #000000;

JSON

{
  "hex": "#171f90",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 144
  },
  "hsl": {
    "h": 236.033,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.33329,
    "c": 0.17917,
    "h": 268.9
  },
  "luminance": 0.03176
}

Semantic roles & 50–950 ramp

primary

#171F90

secondary

#C1B942

accent

#E339EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171F90

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

Preview Lab → · Contrast checker → · Palette generator →