#171F7A#171F7A

#171F7A is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.8% C 0.151 H 270.0°. Best body text is #FFFFFF at 13.88:1 contrast (WCAG AA passes).

Color values

HEX	#171F7A
RGB	rgb(23, 31, 122)
HSL	hsl(235, 68%, 28%)
HSV	hsv(235, 81%, 48%)
CMYK	cmyk(81.1%, 74.6%, 0%, 52.2%)
CIE-LAB	lab(18.22, 31.43, -52.12)
CIE-LCH	lch(18.22, 60.86, 301.09°)
OKLab	oklab(30.8% 0 -0.151)
OKLCH	oklch(30.8% 0.151 270)
XYZ	xyz(4.3550, 2.5668, 18.6745)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F7A #7A7217

analogous

#17507A #171F7A #40177A

triadic

#171F7A #7A171F #1F7A17

tetradic

#171F7A #7A1750 #7A7217 #177A40

square

#171F7A #7A1750 #7A7217 #177A40

split-complementary

#171F7A #7A4017 #507A17

monochromatic

#05071A #0D1247 #171F7A #212CAD #3340D9

Accessibility & contrast

On white

13.88

#171F7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#171F7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F7A

13.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F7A	#FFFFFF	#000000	##FFFFFF
##171F7A	1.00	13.88	1.51	13.88
#FFFFFF	13.88	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317D

Deuteranopia (green-blind)

#002878

Tritanopia (blue-blind)

#00394A

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171f7a;
/* rgb */ color: rgb(23, 31, 122);
/* oklch */ color: oklch(30.8% 0.151 270.0);

Tailwind

colors: {
  custom: {
    50: '#675ba1',
    500: '#171f7a',
    950: '#000000',
  },
}

SCSS

$custom: #171f7a;
$custom-light: #675ba1;
$custom-dark: #000000;

JSON

{
  "hex": "#171f7a",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 122
  },
  "hsl": {
    "h": 235.152,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.30799,
    "c": 0.15096,
    "h": 270
  },
  "luminance": 0.02567
}

Semantic roles & 50–950 ramp

primary

#171F7A

secondary

#AFA63E

accent

#DD3DEB

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F7A

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

Preview Lab → · Contrast checker → · Palette generator →