#171581#171581

#171581 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.2% C 0.170 H 270.8°. Best body text is #FFFFFF at 14.38:1 contrast (WCAG AA passes).

Color values

HEX	#171581
RGB	rgb(23, 21, 129)
HSL	hsl(241, 72%, 29%)
HSV	hsv(241, 84%, 51%)
CMYK	cmyk(82.2%, 83.7%, 0%, 49.4%)
CIE-LAB	lab(17.00, 39.73, -58.59)
CIE-LCH	lch(17.00, 70.79, 304.14°)
OKLab	oklab(30.18% 0.0023 -0.1696)
OKLCH	oklch(30.18% 0.17 270.8)
XYZ	xyz(4.5826, 2.3029, 20.9676)
Luminance	0.0230 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171581 #7F8115

analogous

#154981 #171581 #4D1581

triadic

#171581 #811715 #158117

tetradic

#171581 #811549 #7F8115 #15814D

square

#171581 #811549 #7F8115 #15814D

split-complementary

#171581 #814D15 #498115

monochromatic

#05041A #0E0C4C #171581 #201EB6 #3633DE

Accessibility & contrast

On white

14.38

#171581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#171581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171581

14.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171581	#FFFFFF	#000000	##FFFFFF
##171581	1.00	14.38	1.46	14.38
#FFFFFF	14.38	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F84

Deuteranopia (green-blind)

#00247F

Tritanopia (blue-blind)

#00374C

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #171581;
/* rgb */ color: rgb(23, 21, 129);
/* oklch */ color: oklch(30.2% 0.170 270.8);

Tailwind

colors: {
  custom: {
    50: '#6a55a7',
    500: '#171581',
    950: '#000000',
  },
}

SCSS

$custom: #171581;
$custom-light: #6a55a7;
$custom-dark: #000000;

JSON

{
  "hex": "#171581",
  "rgb": {
    "r": 23,
    "g": 21,
    "b": 129
  },
  "hsl": {
    "h": 241.111,
    "s": 72,
    "l": 29.412
  },
  "oklch": {
    "l": 0.30184,
    "c": 0.16962,
    "h": 270.8
  },
  "luminance": 0.02303
}

Semantic roles & 50–950 ramp

primary

#171581

secondary

#B4B63C

accent

#EF39EB

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #171581

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

Preview Lab → · Contrast checker → · Palette generator →