#171D7F#171D7F

#171D7F is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.0% C 0.160 H 270.0°. Best body text is #FFFFFF at 13.83:1 contrast (WCAG AA passes).

Color values

HEX	#171D7F
RGB	rgb(23, 29, 127)
HSL	hsl(237, 69%, 29%)
HSV	hsv(237, 82%, 50%)
CMYK	cmyk(81.9%, 77.2%, 0%, 50.2%)
CIE-LAB	lab(18.33, 34.52, -55.12)
CIE-LCH	lch(18.33, 65.04, 302.06°)
OKLab	oklab(31.05% 0.0001 -0.1597)
OKLCH	oklch(31.05% 0.16 270)
XYZ	xyz(4.6222, 2.5927, 20.3314)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D7F #7F7917

analogous

#17517F #171D7F #45177F

triadic

#171D7F #7F171D #1D7F17

tetradic

#171D7F #7F1751 #7F7917 #177F45

square

#171D7F #7F1751 #7F7917 #177F45

split-complementary

#171D7F #7F4517 #517F17

monochromatic

#05061A #0E114B #171D7F #2029B3 #363FDB

Accessibility & contrast

On white

13.83

#171D7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#171D7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D7F

13.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D7F	#FFFFFF	#000000	##FFFFFF
##171D7F	1.00	13.83	1.52	13.83
#FFFFFF	13.83	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003282

Deuteranopia (green-blind)

#00277D

Tritanopia (blue-blind)

#003A4C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171d7f;
/* rgb */ color: rgb(23, 29, 127);
/* oklch */ color: oklch(31.0% 0.160 270.0);

Tailwind

colors: {
  custom: {
    50: '#695aa5',
    500: '#171d7f',
    950: '#000000',
  },
}

SCSS

$custom: #171d7f;
$custom-light: #695aa5;
$custom-dark: #000000;

JSON

{
  "hex": "#171d7f",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 127
  },
  "hsl": {
    "h": 236.538,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.31048,
    "c": 0.15966,
    "h": 270
  },
  "luminance": 0.02593
}

Semantic roles & 50–950 ramp

primary

#171D7F

secondary

#B4AD3E

accent

#E23CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171D7F

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

Preview Lab → · Contrast checker → · Palette generator →