#171F73#171F73

#171F73 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.0% C 0.142 H 270.4°. Best body text is #FFFFFF at 14.19:1 contrast (WCAG AA passes).

Color values

HEX	#171F73
RGB	rgb(23, 31, 115)
HSL	hsl(235, 67%, 27%)
HSV	hsv(235, 80%, 45%)
CMYK	cmyk(80%, 73%, 0%, 54.9%)
CIE-LAB	lab(17.46, 28.78, -48.88)
CIE-LCH	lch(17.46, 56.73, 300.49°)
OKLab	oklab(30.02% 0.001 -0.1415)
OKLCH	oklch(30.02% 0.142 270.4)
XYZ	xyz(3.9368, 2.3995, 16.4720)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F73 #736B17

analogous

#174D73 #171F73 #3D1773

triadic

#171F73 #73171F #1F7317

tetradic

#171F73 #73174D #736B17 #17733D

square

#171F73 #73174D #736B17 #17733D

split-complementary

#171F73 #733D17 #4D7317

monochromatic

#05071A #0D1140 #171F73 #212DA6 #2F3DD5

Accessibility & contrast

On white

14.19

#171F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#171F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F73

14.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F73	#FFFFFF	#000000	##FFFFFF
##171F73	1.00	14.19	1.48	14.19
#FFFFFF	14.19	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F76

Deuteranopia (green-blind)

#002671

Tritanopia (blue-blind)

#003646

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171f73;
/* rgb */ color: rgb(23, 31, 115);
/* oklch */ color: oklch(30.0% 0.142 270.4);

Tailwind

colors: {
  custom: {
    50: '#655b9c',
    500: '#171f73',
    950: '#000000',
  },
}

SCSS

$custom: #171f73;
$custom-light: #655b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#171f73",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 115
  },
  "hsl": {
    "h": 234.783,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.30024,
    "c": 0.14151,
    "h": 270.4
  },
  "luminance": 0.024
}

Semantic roles & 50–950 ramp

primary

#171F73

secondary

#A99F3D

accent

#DB3EEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #171F73

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

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