#171C66#171C66

#171C66 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.1% C 0.127 H 271.9°. Best body text is #FFFFFF at 15.06:1 contrast (WCAG AA passes).

Color values

HEX	#171C66
RGB	rgb(23, 28, 102)
HSL	hsl(236, 63%, 25%)
HSV	hsv(236, 77%, 40%)
CMYK	cmyk(77.5%, 72.5%, 0%, 60%)
CIE-LAB	lab(15.34, 25.80, -43.90)
CIE-LCH	lch(15.34, 50.92, 300.45°)
OKLab	oklab(28.08% 0.0043 -0.127)
OKLCH	oklch(28.08% 0.127 271.9)
XYZ	xyz(3.1661, 1.9717, 12.7815)
Luminance	0.0197 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C66 #666117

analogous

#174366 #171C66 #3A1766

triadic

#171C66 #66171C #1C6617

tetradic

#171C66 #661743 #666117 #17663A

square

#171C66 #661743 #666117 #17663A

split-complementary

#171C66 #663A17 #436617

monochromatic

#060719 #0C0E34 #171C66 #222A98 #2E37CA

Accessibility & contrast

On white

15.06

#171C66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#171C66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C66

15.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C66	#FFFFFF	#000000	##FFFFFF
##171C66	1.00	15.06	1.39	15.06
#FFFFFF	15.06	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A68

Deuteranopia (green-blind)

#002365

Tritanopia (blue-blind)

#00303E

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171c66;
/* rgb */ color: rgb(23, 28, 102);
/* oklch */ color: oklch(28.1% 0.127 271.9);

Tailwind

colors: {
  custom: {
    50: '#625892',
    500: '#171c66',
    950: '#000000',
  },
}

SCSS

$custom: #171c66;
$custom-light: #625892;
$custom-dark: #000000;

JSON

{
  "hex": "#171c66",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 102
  },
  "hsl": {
    "h": 236.203,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.28076,
    "c": 0.12703,
    "h": 271.9
  },
  "luminance": 0.01972
}

Semantic roles & 50–950 ramp

primary

#171C66

secondary

#9C963C

accent

#DC42E6

background

#F6F5F9

surface

#EBE9F1

border

#C6C5CB

text

#06030D

muted

#7A787E

Preview Lab

Preview with #171C66

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

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