#171B8E#171B8E

#171B8E is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.180 H 269.4°. Best body text is #FFFFFF at 13.26:1 contrast (WCAG AA passes).

Color values

HEX	#171B8E
RGB	rgb(23, 27, 142)
HSL	hsl(238, 72%, 32%)
HSV	hsv(238, 84%, 56%)
CMYK	cmyk(83.8%, 81%, 0%, 44.3%)
CIE-LAB	lab(19.71, 40.92, -62.27)
CIE-LCH	lch(19.71, 74.51, 303.31°)
OKLab	oklab(32.54% -0.002 -0.1804)
OKLCH	oklch(32.54% 0.18 269.4)
XYZ	xyz(5.6261, 2.9184, 25.8527)
Luminance	0.0292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B8E #8E8A17

analogous

#17578E #171B8E #4E178E

triadic

#171B8E #8E171B #1B8E17

tetradic

#171B8E #8E1757 #8E8A17 #178E4E

square

#171B8E #8E1757 #8E8A17 #178E4E

split-complementary

#171B8E #8E4E17 #578E17

monochromatic

#060725 #0E1159 #171B8E #2025C3 #3F45E0

Accessibility & contrast

On white

13.26

#171B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#171B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B8E

13.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B8E	#FFFFFF	#000000	##FFFFFF
##171B8E	1.00	13.26	1.58	13.26
#FFFFFF	13.26	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003691

Deuteranopia (green-blind)

#00298C

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171b8e;
/* rgb */ color: rgb(23, 27, 142);
/* oklch */ color: oklch(32.5% 0.180 269.4);

Tailwind

colors: {
  custom: {
    50: '#6d5ab0',
    500: '#171b8e',
    950: '#000000',
  },
}

SCSS

$custom: #171b8e;
$custom-light: #6d5ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#171b8e",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 142
  },
  "hsl": {
    "h": 237.983,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32543,
    "c": 0.18037,
    "h": 269.4
  },
  "luminance": 0.02919
}

Semantic roles & 50–950 ramp

primary

#171B8E

secondary

#C0BC40

accent

#E939EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171B8E

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

Preview Lab → · Contrast checker → · Palette generator →