#171C80#171C80

#171C80 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.0% C 0.162 H 270.1°. Best body text is #FFFFFF at 13.87:1 contrast (WCAG AA passes).

Color values

HEX	#171C80
RGB	rgb(23, 28, 128)
HSL	hsl(237, 70%, 30%)
HSV	hsv(237, 82%, 50%)
CMYK	cmyk(82%, 78.1%, 0%, 49.8%)
CIE-LAB	lab(18.23, 35.48, -55.92)
CIE-LCH	lch(18.23, 66.22, 302.40°)
OKLab	oklab(31.01% 0.0003 -0.162)
OKLCH	oklch(31.01% 0.162 270.1)
XYZ	xyz(4.6636, 2.5706, 20.6683)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C80 #807B17

analogous

#175180 #171C80 #471780

triadic

#171C80 #80171C #1C8017

tetradic

#171C80 #801751 #807B17 #178047

square

#171C80 #801751 #807B17 #178047

split-complementary

#171C80 #804717 #518017

monochromatic

#05061A #0E114C #171C80 #2027B4 #363EDB

Accessibility & contrast

On white

13.87

#171C80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#171C80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C80

13.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C80	#FFFFFF	#000000	##FFFFFF
##171C80	1.00	13.87	1.51	13.87
#FFFFFF	13.87	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003283

Deuteranopia (green-blind)

#00277E

Tritanopia (blue-blind)

#003A4D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171c80;
/* rgb */ color: rgb(23, 28, 128);
/* oklch */ color: oklch(31.0% 0.162 270.1);

Tailwind

colors: {
  custom: {
    50: '#6959a6',
    500: '#171c80',
    950: '#000000',
  },
}

SCSS

$custom: #171c80;
$custom-light: #6959a6;
$custom-dark: #000000;

JSON

{
  "hex": "#171c80",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 128
  },
  "hsl": {
    "h": 237.143,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31013,
    "c": 0.16196,
    "h": 270.1
  },
  "luminance": 0.02571
}

Semantic roles & 50–950 ramp

primary

#171C80

secondary

#B4AF3E

accent

#E43BEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #171C80

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

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