#171B8F#171B8F

#171B8F is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.7% C 0.182 H 269.3°. Best body text is #FFFFFF at 13.21:1 contrast (WCAG AA passes).

Color values

HEX	#171B8F
RGB	rgb(23, 27, 143)
HSL	hsl(238, 72%, 33%)
HSV	hsv(238, 84%, 56%)
CMYK	cmyk(83.9%, 81.1%, 0%, 43.9%)
CIE-LAB	lab(19.84, 41.26, -62.69)
CIE-LCH	lch(19.84, 75.05, 303.35°)
OKLab	oklab(32.67% -0.0022 -0.1816)
OKLCH	oklch(32.67% 0.182 269.3)
XYZ	xyz(5.7015, 2.9485, 26.2499)
Luminance	0.0295 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B8F #8F8B17

analogous

#17578F #171B8F #4F178F

triadic

#171B8F #8F171B #1B8F17

tetradic

#171B8F #8F1757 #8F8B17 #178F4F

square

#171B8F #8F1757 #8F8B17 #178F4F

split-complementary

#171B8F #8F4F17 #578F17

monochromatic

#060726 #0F115A #171B8F #1F25C4 #4045E0

Accessibility & contrast

On white

13.21

#171B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#171B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B8F

13.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B8F	#FFFFFF	#000000	##FFFFFF
##171B8F	1.00	13.21	1.59	13.21
#FFFFFF	13.21	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003692

Deuteranopia (green-blind)

#002A8D

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171b8f;
/* rgb */ color: rgb(23, 27, 143);
/* oklch */ color: oklch(32.7% 0.182 269.3);

Tailwind

colors: {
  custom: {
    50: '#6e5ab1',
    500: '#171b8f',
    950: '#000000',
  },
}

SCSS

$custom: #171b8f;
$custom-light: #6e5ab1;
$custom-dark: #000000;

JSON

{
  "hex": "#171b8f",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 143
  },
  "hsl": {
    "h": 238,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32665,
    "c": 0.18159,
    "h": 269.3
  },
  "luminance": 0.02949
}

Semantic roles & 50–950 ramp

primary

#171B8F

secondary

#C1BC41

accent

#E939EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #171B8F

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

Preview Lab → · Contrast checker → · Palette generator →