#171C77#171C77

#171C77 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.0% C 0.150 H 270.7°. Best body text is #FFFFFF at 14.30:1 contrast (WCAG AA passes).

Color values

HEX	#171C77
RGB	rgb(23, 28, 119)
HSL	hsl(237, 68%, 28%)
HSV	hsv(237, 81%, 47%)
CMYK	cmyk(80.7%, 76.5%, 0%, 53.3%)
CIE-LAB	lab(17.20, 32.22, -51.88)
CIE-LCH	lch(17.20, 61.07, 301.84°)
OKLab	oklab(29.97% 0.0018 -0.1502)
OKLCH	oklch(29.97% 0.15 270.7)
XYZ	xyz(4.0972, 2.3441, 17.6857)
Luminance	0.0234 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C77 #777217

analogous

#174C77 #171C77 #421777

triadic

#171C77 #77171C #1C7717

tetradic

#171C77 #77174C #777217 #177742

square

#171C77 #77174C #777217 #177742

split-complementary

#171C77 #774217 #4C7717

monochromatic

#05061A #0D1044 #171C77 #2128AA #313AD7

Accessibility & contrast

On white

14.30

#171C77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#171C77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C77

14.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C77	#FFFFFF	#000000	##FFFFFF
##171C77	1.00	14.30	1.47	14.30
#FFFFFF	14.30	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7A

Deuteranopia (green-blind)

#002675

Tritanopia (blue-blind)

#003648

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #171c77;
/* rgb */ color: rgb(23, 28, 119);
/* oklch */ color: oklch(30.0% 0.150 270.7);

Tailwind

colors: {
  custom: {
    50: '#67599f',
    500: '#171c77',
    950: '#000000',
  },
}

SCSS

$custom: #171c77;
$custom-light: #67599f;
$custom-dark: #000000;

JSON

{
  "hex": "#171c77",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 119
  },
  "hsl": {
    "h": 236.875,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.2997,
    "c": 0.15026,
    "h": 270.7
  },
  "luminance": 0.02345
}

Semantic roles & 50–950 ramp

primary

#171C77

secondary

#ACA63E

accent

#E13DEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030F

muted

#7A787E

Preview Lab

Preview with #171C77

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

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