#171F72#171F72

#171F72 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 29.9% C 0.140 H 270.4°. Best body text is #FFFFFF at 14.23:1 contrast (WCAG AA passes).

Color values

HEX	#171F72
RGB	rgb(23, 31, 114)
HSL	hsl(235, 66%, 27%)
HSV	hsv(235, 80%, 45%)
CMYK	cmyk(79.8%, 72.8%, 0%, 55.3%)
CIE-LAB	lab(17.35, 28.40, -48.41)
CIE-LCH	lch(17.35, 56.13, 300.40°)
OKLab	oklab(29.92% 0.0011 -0.1401)
OKLCH	oklch(29.92% 0.14 270.4)
XYZ	xyz(3.8796, 2.3766, 16.1706)
Luminance	0.0238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F72 #726A17

analogous

#174D72 #171F72 #3D1772

triadic

#171F72 #72171F #1F7217

tetradic

#171F72 #72174D #726A17 #17723D

square

#171F72 #72174D #726A17 #17723D

split-complementary

#171F72 #723D17 #4D7217

monochromatic

#050719 #0D113F #171F72 #212DA5 #2E3DD5

Accessibility & contrast

On white

14.23

#171F72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#171F72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F72

14.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F72	#FFFFFF	#000000	##FFFFFF
##171F72	1.00	14.23	1.48	14.23
#FFFFFF	14.23	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F75

Deuteranopia (green-blind)

#002670

Tritanopia (blue-blind)

#003646

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171f72;
/* rgb */ color: rgb(23, 31, 114);
/* oklch */ color: oklch(29.9% 0.140 270.4);

Tailwind

colors: {
  custom: {
    50: '#655b9b',
    500: '#171f72',
    950: '#000000',
  },
}

SCSS

$custom: #171f72;
$custom-light: #655b9b;
$custom-dark: #000000;

JSON

{
  "hex": "#171f72",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 114
  },
  "hsl": {
    "h": 234.725,
    "s": 66.423,
    "l": 26.863
  },
  "oklch": {
    "l": 0.29915,
    "c": 0.14014,
    "h": 270.4
  },
  "luminance": 0.02377
}

Semantic roles & 50–950 ramp

primary

#171F72

secondary

#A89E3D

accent

#DA3EE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #171F72

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

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