#311D81#311D81

#311D81 is a dark, vivid violet. Relative luminance 0.031; OKLCH L 33.2% C 0.156 H 283.0°. Best body text is #FFFFFF at 12.94:1 contrast (WCAG AA passes).

Color values

HEX	#311D81
RGB	rgb(49, 29, 129)
HSL	hsl(252, 63%, 31%)
HSV	hsv(252, 78%, 51%)
CMYK	cmyk(62%, 77.5%, 0%, 49.4%)
CIE-LAB	lab(20.50, 37.99, -52.74)
CIE-LCH	lch(20.50, 65.00, 305.77°)
OKLab	oklab(33.15% 0.0351 -0.152)
OKLCH	oklch(33.15% 0.156 283)
XYZ	xyz(5.6672, 3.1163, 21.0675)
Luminance	0.0312 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311D81 #6D811D

analogous

#1D3B81 #311D81 #631D81

triadic

#311D81 #81311D #1D8131

tetradic

#311D81 #811D3B #6D811D #1D8163

square

#311D81 #811D3B #6D811D #1D8163

split-complementary

#311D81 #81631D #3B811D

monochromatic

#0B071D #1E124F #311D81 #4428B3 #6144D5

Accessibility & contrast

On white

12.94

#311D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#311D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311D81

12.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311D81	#FFFFFF	#000000	##FFFFFF
##311D81	1.00	12.94	1.62	12.94
#FFFFFF	12.94	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003484

Deuteranopia (green-blind)

#002E7F

Tritanopia (blue-blind)

#00394E

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #311d81;
/* rgb */ color: rgb(49, 29, 129);
/* oklch */ color: oklch(33.2% 0.156 283.0);

Tailwind

colors: {
  custom: {
    50: '#745ca7',
    500: '#311d81',
    950: '#000000',
  },
}

SCSS

$custom: #311d81;
$custom-light: #745ca7;
$custom-dark: #000000;

JSON

{
  "hex": "#311d81",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 129
  },
  "hsl": {
    "h": 252,
    "s": 63.291,
    "l": 30.98
  },
  "oklch": {
    "l": 0.33151,
    "c": 0.15602,
    "h": 283
  },
  "luminance": 0.03117
}

Semantic roles & 50–950 ramp

primary

#311D81

secondary

#9EB446

accent

#E641C5

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#09040F

muted

#7B797F

Preview Lab

Preview with #311D81

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

Preview Lab → · Contrast checker → · Palette generator →