#171C73#171C73

#171C73 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.5% C 0.145 H 271.0°. Best body text is #FFFFFF at 14.48:1 contrast (WCAG AA passes).

Color values

HEX	#171C73
RGB	rgb(23, 28, 115)
HSL	hsl(237, 67%, 27%)
HSV	hsv(237, 80%, 45%)
CMYK	cmyk(80%, 75.7%, 0%, 54.9%)
CIE-LAB	lab(16.75, 30.74, -50.05)
CIE-LCH	lch(16.75, 58.74, 301.56°)
OKLab	oklab(29.52% 0.0025 -0.1449)
OKLCH	oklch(29.52% 0.145 271)
XYZ	xyz(3.8621, 2.2500, 16.4471)
Luminance	0.0225 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C73 #736E17

analogous

#174A73 #171C73 #401773

triadic

#171C73 #73171C #1C7317

tetradic

#171C73 #73174A #736E17 #177340

square

#171C73 #73174A #736E17 #177340

split-complementary

#171C73 #734017 #4A7317

monochromatic

#05061A #0D1040 #171C73 #2128A6 #2F38D5

Accessibility & contrast

On white

14.48

#171C73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#171C73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C73

14.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C73	#FFFFFF	#000000	##FFFFFF
##171C73	1.00	14.48	1.45	14.48
#FFFFFF	14.48	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E76

Deuteranopia (green-blind)

#002571

Tritanopia (blue-blind)

#003545

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #171c73;
/* rgb */ color: rgb(23, 28, 115);
/* oklch */ color: oklch(29.5% 0.145 271.0);

Tailwind

colors: {
  custom: {
    50: '#66599c',
    500: '#171c73',
    950: '#000000',
  },
}

SCSS

$custom: #171c73;
$custom-light: #66599c;
$custom-dark: #000000;

JSON

{
  "hex": "#171c73",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 115
  },
  "hsl": {
    "h": 236.739,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.29515,
    "c": 0.14493,
    "h": 271
  },
  "luminance": 0.0225
}

Semantic roles & 50–950 ramp

primary

#171C73

secondary

#A9A33D

accent

#E03EEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171C73

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

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