#171B8D#171B8D

#171B8D is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.179 H 269.4°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#171B8D
RGB	rgb(23, 27, 141)
HSL	hsl(238, 72%, 32%)
HSV	hsv(238, 84%, 55%)
CMYK	cmyk(83.7%, 80.9%, 0%, 44.7%)
CIE-LAB	lab(19.59, 40.58, -61.85)
CIE-LCH	lch(19.59, 73.97, 303.27°)
OKLab	oklab(32.42% -0.0018 -0.1791)
OKLCH	oklch(32.42% 0.179 269.4)
XYZ	xyz(5.5514, 2.8885, 25.4591)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B8D #8D8917

analogous

#17568D #171B8D #4E178D

triadic

#171B8D #8D171B #1B8D17

tetradic

#171B8D #8D1756 #8D8917 #178D4E

square

#171B8D #8D1756 #8D8917 #178D4E

split-complementary

#171B8D #8D4E17 #568D17

monochromatic

#060724 #0E1158 #171B8D #2025C2 #3F44E0

Accessibility & contrast

On white

13.31

#171B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#171B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B8D

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B8D	#FFFFFF	#000000	##FFFFFF
##171B8D	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003590

Deuteranopia (green-blind)

#00298B

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #171b8d;
/* rgb */ color: rgb(23, 27, 141);
/* oklch */ color: oklch(32.4% 0.179 269.4);

Tailwind

colors: {
  custom: {
    50: '#6d5ab0',
    500: '#171b8d',
    950: '#000000',
  },
}

SCSS

$custom: #171b8d;
$custom-light: #6d5ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#171b8d",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 141
  },
  "hsl": {
    "h": 237.966,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32422,
    "c": 0.17916,
    "h": 269.4
  },
  "luminance": 0.02889
}

Semantic roles & 50–950 ramp

primary

#171B8D

secondary

#C0BC40

accent

#E939EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171B8D

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

Preview Lab → · Contrast checker → · Palette generator →