#311C81#311C81

#311C81 is a dark, vivid violet. Relative luminance 0.031; OKLCH L 33.0% C 0.157 H 283.2°. Best body text is #FFFFFF at 13.01:1 contrast (WCAG AA passes).

Color values

HEX	#311C81
RGB	rgb(49, 28, 129)
HSL	hsl(252, 64%, 31%)
HSV	hsv(252, 78%, 51%)
CMYK	cmyk(62%, 78.3%, 0%, 49.4%)
CIE-LAB	lab(20.31, 38.53, -53.05)
CIE-LCH	lch(20.31, 65.57, 305.99°)
OKLab	oklab(33.02% 0.0358 -0.1529)
OKLCH	oklch(33.02% 0.157 283.2)
XYZ	xyz(5.6431, 3.0681, 21.0595)
Luminance	0.0307 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311C81 #6C811C

analogous

#1C3981 #311C81 #631C81

triadic

#311C81 #81311C #1C8131

tetradic

#311C81 #811C39 #6C811C #1C8163

square

#311C81 #811C39 #6C811C #1C8163

split-complementary

#311C81 #81631C #39811C

monochromatic

#0B061C #1E114F #311C81 #4427B3 #6042D6

Accessibility & contrast

On white

13.01

#311C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#311C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311C81

13.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311C81	#FFFFFF	#000000	##FFFFFF
##311C81	1.00	13.01	1.61	13.01
#FFFFFF	13.01	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003484

Deuteranopia (green-blind)

#002E7F

Tritanopia (blue-blind)

#00394D

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #311c81;
/* rgb */ color: rgb(49, 28, 129);
/* oklch */ color: oklch(33.0% 0.157 283.2);

Tailwind

colors: {
  custom: {
    50: '#745ba7',
    500: '#311c81',
    950: '#000000',
  },
}

SCSS

$custom: #311c81;
$custom-light: #745ba7;
$custom-dark: #000000;

JSON

{
  "hex": "#311c81",
  "rgb": {
    "r": 49,
    "g": 28,
    "b": 129
  },
  "hsl": {
    "h": 252.475,
    "s": 64.331,
    "l": 30.784
  },
  "oklch": {
    "l": 0.33018,
    "c": 0.15706,
    "h": 283.2
  },
  "luminance": 0.03068
}

Semantic roles & 50–950 ramp

primary

#311C81

secondary

#9DB444

accent

#E740C5

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #311C81

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

Preview Lab → · Contrast checker → · Palette generator →