#171FA0#171FA0

#171FA0 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.2% C 0.199 H 268.2°. Best body text is #FFFFFF at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#171FA0
RGB	rgb(23, 31, 160)
HSL	hsl(236, 75%, 36%)
HSV	hsv(236, 86%, 63%)
CMYK	cmyk(85.6%, 80.6%, 0%, 37.3%)
CIE-LAB	lab(22.65, 44.83, -68.49)
CIE-LCH	lch(22.65, 81.86, 303.20°)
OKLab	oklab(35.24% -0.0061 -0.1984)
OKLCH	oklch(35.24% 0.199 268.2)
XYZ	xyz(7.1863, 3.6993, 33.5862)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171FA0 #A09817

analogous

#1763A0 #171FA0 #5317A0

triadic

#171FA0 #A0171F #1FA017

tetradic

#171FA0 #A01763 #A09817 #17A053

square

#171FA0 #A01763 #A09817 #17A053

split-complementary

#171FA0 #A05317 #63A017

monochromatic

#080A35 #0F156A #171FA0 #1F29D6 #4C55E5

Accessibility & contrast

On white

12.07

#171FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#171FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171FA0

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171FA0	#FFFFFF	#000000	##FFFFFF
##171FA0	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)

#003DA4

Deuteranopia (green-blind)

#002F9E

Tritanopia (blue-blind)

#004860

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #171fa0;
/* rgb */ color: rgb(23, 31, 160);
/* oklch */ color: oklch(35.2% 0.199 268.2);

Tailwind

colors: {
  custom: {
    50: '#725dbd',
    500: '#171fa0',
    950: '#000000',
  },
}

SCSS

$custom: #171fa0;
$custom-light: #725dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#171fa0",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 160
  },
  "hsl": {
    "h": 236.496,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.35236,
    "c": 0.19853,
    "h": 268.2
  },
  "luminance": 0.037
}

Semantic roles & 50–950 ramp

primary

#171FA0

secondary

#C7C04C

accent

#E736F1

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #171FA0

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

Preview Lab → · Contrast checker → · Palette generator →