#171D71#171D71

#171D71 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.5% C 0.141 H 270.9°. Best body text is #FFFFFF at 14.48:1 contrast (WCAG AA passes).

Color values

HEX	#171D71
RGB	rgb(23, 29, 113)
HSL	hsl(236, 66%, 27%)
HSV	hsv(236, 80%, 44%)
CMYK	cmyk(79.6%, 74.3%, 0%, 55.7%)
CIE-LAB	lab(16.76, 29.34, -48.74)
CIE-LCH	lch(16.76, 56.89, 301.05°)
OKLab	oklab(29.46% 0.0023 -0.1411)
OKLCH	oklch(29.46% 0.141 270.9)
XYZ	xyz(3.7723, 2.2527, 15.8556)
Luminance	0.0225 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D71 #716B17

analogous

#174A71 #171D71 #3E1771

triadic

#171D71 #71171D #1D7117

tetradic

#171D71 #71174A #716B17 #17713E

square

#171D71 #71174A #716B17 #17713E

split-complementary

#171D71 #713E17 #4A7117

monochromatic

#050719 #0D103E #171D71 #212AA4 #2E39D4

Accessibility & contrast

On white

14.48

#171D71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#171D71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D71

14.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D71	#FFFFFF	#000000	##FFFFFF
##171D71	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)

#002E74

Deuteranopia (green-blind)

#00256F

Tritanopia (blue-blind)

#003545

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #171d71;
/* rgb */ color: rgb(23, 29, 113);
/* oklch */ color: oklch(29.5% 0.141 270.9);

Tailwind

colors: {
  custom: {
    50: '#65599b',
    500: '#171d71',
    950: '#000000',
  },
}

SCSS

$custom: #171d71;
$custom-light: #65599b;
$custom-dark: #000000;

JSON

{
  "hex": "#171d71",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 113
  },
  "hsl": {
    "h": 236,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.29458,
    "c": 0.14111,
    "h": 270.9
  },
  "luminance": 0.02253
}

Semantic roles & 50–950 ramp

primary

#171D71

secondary

#A7A03D

accent

#DE3FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171D71

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

Preview Lab → · Contrast checker → · Palette generator →