#171C7F#171C7F

#171C7F is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.9% C 0.161 H 270.2°. Best body text is #FFFFFF at 13.92:1 contrast (WCAG AA passes).

Color values

HEX	#171C7F
RGB	rgb(23, 28, 127)
HSL	hsl(237, 69%, 29%)
HSV	hsv(237, 82%, 50%)
CMYK	cmyk(81.9%, 78%, 0%, 50.2%)
CIE-LAB	lab(18.12, 35.13, -55.47)
CIE-LCH	lch(18.12, 65.66, 302.34°)
OKLab	oklab(30.9% 0.0005 -0.1607)
OKLCH	oklch(30.9% 0.161 270.2)
XYZ	xyz(4.5981, 2.5444, 20.3234)
Luminance	0.0255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C7F #7F7A17

analogous

#17507F #171C7F #46177F

triadic

#171C7F #7F171C #1C7F17

tetradic

#171C7F #7F1750 #7F7A17 #177F46

square

#171C7F #7F1750 #7F7A17 #177F46

split-complementary

#171C7F #7F4617 #507F17

monochromatic

#05061A #0E114B #171C7F #2027B3 #363EDB

Accessibility & contrast

On white

13.92

#171C7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#171C7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C7F

13.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C7F	#FFFFFF	#000000	##FFFFFF
##171C7F	1.00	13.92	1.51	13.92
#FFFFFF	13.92	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003182

Deuteranopia (green-blind)

#00277D

Tritanopia (blue-blind)

#00394C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #171c7f;
/* rgb */ color: rgb(23, 28, 127);
/* oklch */ color: oklch(30.9% 0.161 270.2);

Tailwind

colors: {
  custom: {
    50: '#6959a5',
    500: '#171c7f',
    950: '#000000',
  },
}

SCSS

$custom: #171c7f;
$custom-light: #6959a5;
$custom-dark: #000000;

JSON

{
  "hex": "#171c7f",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 127
  },
  "hsl": {
    "h": 237.115,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.30896,
    "c": 0.16068,
    "h": 270.2
  },
  "luminance": 0.02545
}

Semantic roles & 50–950 ramp

primary

#171C7F

secondary

#B4AE3E

accent

#E43CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #171C7F

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

Preview Lab → · Contrast checker → · Palette generator →