#171F7D#171F7D

#171F7D is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.1% C 0.155 H 269.9°. Best body text is #FFFFFF at 13.74:1 contrast (WCAG AA passes).

Color values

HEX	#171F7D
RGB	rgb(23, 31, 125)
HSL	hsl(235, 69%, 29%)
HSV	hsv(235, 82%, 49%)
CMYK	cmyk(81.6%, 75.2%, 0%, 51%)
CIE-LAB	lab(18.55, 32.54, -53.49)
CIE-LCH	lch(18.55, 62.61, 301.32°)
OKLab	oklab(31.14% -0.0004 -0.1549)
OKLCH	oklch(31.14% 0.155 269.9)
XYZ	xyz(4.5437, 2.6423, 19.6686)
Luminance	0.0264 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F7D #7D7517

analogous

#17527D #171F7D #42177D

triadic

#171F7D #7D171F #1F7D17

tetradic

#171F7D #7D1752 #7D7517 #177D42

square

#171F7D #7D1752 #7D7517 #177D42

split-complementary

#171F7D #7D4217 #527D17

monochromatic

#05061A #0D1249 #171F7D #212CB1 #3542DA

Accessibility & contrast

On white

13.74

#171F7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#171F7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F7D

13.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F7D	#FFFFFF	#000000	##FFFFFF
##171F7D	1.00	13.74	1.53	13.74
#FFFFFF	13.74	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003280

Deuteranopia (green-blind)

#00287B

Tritanopia (blue-blind)

#003A4C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171f7d;
/* rgb */ color: rgb(23, 31, 125);
/* oklch */ color: oklch(31.1% 0.155 269.9);

Tailwind

colors: {
  custom: {
    50: '#685ba4',
    500: '#171f7d',
    950: '#000000',
  },
}

SCSS

$custom: #171f7d;
$custom-light: #685ba4;
$custom-dark: #000000;

JSON

{
  "hex": "#171f7d",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 125
  },
  "hsl": {
    "h": 235.294,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31136,
    "c": 0.15493,
    "h": 269.9
  },
  "luminance": 0.02643
}

Semantic roles & 50–950 ramp

primary

#171F7D

secondary

#B2A93E

accent

#DE3CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F7D

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

Preview Lab → · Contrast checker → · Palette generator →