#171D8F#171D8F

#171D8F is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.180 H 269.1°. Best body text is #FFFFFF at 13.05:1 contrast (WCAG AA passes).

Color values

HEX	#171D8F
RGB	rgb(23, 29, 143)
HSL	hsl(237, 72%, 33%)
HSV	hsv(237, 84%, 56%)
CMYK	cmyk(83.9%, 79.7%, 0%, 43.9%)
CIE-LAB	lab(20.22, 40.16, -62.06)
CIE-LCH	lch(20.22, 73.92, 302.91°)
OKLab	oklab(32.93% -0.0027 -0.1798)
OKLCH	oklch(32.93% 0.18 269.1)
XYZ	xyz(5.7489, 3.0434, 26.2657)
Luminance	0.0304 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D8F #8F8917

analogous

#17598F #171D8F #4D178F

triadic

#171D8F #8F171D #1D8F17

tetradic

#171D8F #8F1759 #8F8917 #178F4D

square

#171D8F #8F1759 #8F8917 #178F4D

split-complementary

#171D8F #8F4D17 #598F17

monochromatic

#060826 #0F125A #171D8F #1F28C4 #4048E0

Accessibility & contrast

On white

13.05

#171D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#171D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D8F

13.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D8F	#FFFFFF	#000000	##FFFFFF
##171D8F	1.00	13.05	1.61	13.05
#FFFFFF	13.05	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003792

Deuteranopia (green-blind)

#002B8D

Tritanopia (blue-blind)

#004056

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #171d8f;
/* rgb */ color: rgb(23, 29, 143);
/* oklch */ color: oklch(32.9% 0.180 269.1);

Tailwind

colors: {
  custom: {
    50: '#6d5bb1',
    500: '#171d8f',
    950: '#000000',
  },
}

SCSS

$custom: #171d8f;
$custom-light: #6d5bb1;
$custom-dark: #000000;

JSON

{
  "hex": "#171d8f",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 143
  },
  "hsl": {
    "h": 237,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32931,
    "c": 0.1798,
    "h": 269.1
  },
  "luminance": 0.03044
}

Semantic roles & 50–950 ramp

primary

#171D8F

secondary

#C1BA41

accent

#E639EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171D8F

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

Preview Lab → · Contrast checker → · Palette generator →