#311F81#311F81

#311F81 is a dark, vivid violet. Relative luminance 0.032; OKLCH L 33.4% C 0.154 H 282.6°. Best body text is #FFFFFF at 12.78:1 contrast (WCAG AA passes).

Color values

HEX	#311F81
RGB	rgb(49, 31, 129)
HSL	hsl(251, 61%, 31%)
HSV	hsv(251, 76%, 51%)
CMYK	cmyk(62%, 76%, 0%, 49.4%)
CIE-LAB	lab(20.89, 36.89, -52.10)
CIE-LCH	lch(20.89, 63.83, 305.30°)
OKLab	oklab(33.43% 0.0336 -0.1502)
OKLCH	oklch(33.43% 0.154 282.6)
XYZ	xyz(5.7178, 3.2175, 21.0844)
Luminance	0.0322 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311F81 #6F811F

analogous

#1F3E81 #311F81 #621F81

triadic

#311F81 #81311F #1F8131

tetradic

#311F81 #811F3E #6F811F #1F8162

square

#311F81 #811F3E #6F811F #1F8162

split-complementary

#311F81 #81621F #3E811F

monochromatic

#0C071E #1E1350 #311F81 #442BB2 #6147D3

Accessibility & contrast

On white

12.78

#311F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#311F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311F81

12.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311F81	#FFFFFF	#000000	##FFFFFF
##311F81	1.00	12.78	1.64	12.78
#FFFFFF	12.78	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003584

Deuteranopia (green-blind)

#002F7F

Tritanopia (blue-blind)

#003A4E

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #311f81;
/* rgb */ color: rgb(49, 31, 129);
/* oklch */ color: oklch(33.4% 0.154 282.6);

Tailwind

colors: {
  custom: {
    50: '#745da7',
    500: '#311f81',
    950: '#000000',
  },
}

SCSS

$custom: #311f81;
$custom-light: #745da7;
$custom-dark: #000000;

JSON

{
  "hex": "#311f81",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 129
  },
  "hsl": {
    "h": 251.02,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.33426,
    "c": 0.15387,
    "h": 282.6
  },
  "luminance": 0.03218
}

Semantic roles & 50–950 ramp

primary

#311F81

secondary

#A0B448

accent

#E443C7

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#09040F

muted

#7B797F

Preview Lab

Preview with #311F81

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

Preview Lab → · Contrast checker → · Palette generator →