#171D8E#171D8E

#171D8E is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.8% C 0.179 H 269.2°. Best body text is #FFFFFF at 13.10:1 contrast (WCAG AA passes).

Color values

HEX	#171D8E
RGB	rgb(23, 29, 142)
HSL	hsl(237, 72%, 32%)
HSV	hsv(237, 84%, 56%)
CMYK	cmyk(83.8%, 79.6%, 0%, 44.3%)
CIE-LAB	lab(20.10, 39.82, -61.63)
CIE-LCH	lch(20.10, 73.38, 302.86°)
OKLab	oklab(32.81% -0.0025 -0.1786)
OKLCH	oklch(32.81% 0.179 269.2)
XYZ	xyz(5.6735, 3.0132, 25.8685)
Luminance	0.0301 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D8E #8E8817

analogous

#17588E #171D8E #4D178E

triadic

#171D8E #8E171D #1D8E17

tetradic

#171D8E #8E1758 #8E8817 #178E4D

square

#171D8E #8E1758 #8E8817 #178E4D

split-complementary

#171D8E #8E4D17 #588E17

monochromatic

#060725 #0E1259 #171D8E #2028C3 #3F48E0

Accessibility & contrast

On white

13.10

#171D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#171D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D8E

13.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D8E	#FFFFFF	#000000	##FFFFFF
##171D8E	1.00	13.10	1.60	13.10
#FFFFFF	13.10	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003691

Deuteranopia (green-blind)

#002A8C

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #171d8e;
/* rgb */ color: rgb(23, 29, 142);
/* oklch */ color: oklch(32.8% 0.179 269.2);

Tailwind

colors: {
  custom: {
    50: '#6d5bb0',
    500: '#171d8e',
    950: '#000000',
  },
}

SCSS

$custom: #171d8e;
$custom-light: #6d5bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#171d8e",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 142
  },
  "hsl": {
    "h": 236.975,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32812,
    "c": 0.17858,
    "h": 269.2
  },
  "luminance": 0.03014
}

Semantic roles & 50–950 ramp

primary

#171D8E

secondary

#C0BA40

accent

#E639EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171D8E

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

Preview Lab → · Contrast checker → · Palette generator →