#311D8A#311D8A

#311D8A is a dark, vivid violet. Relative luminance 0.034; OKLCH L 34.1% C 0.167 H 281.2°. Best body text is #FFFFFF at 12.55:1 contrast (WCAG AA passes).

Color values

HEX	#311D8A
RGB	rgb(49, 29, 138)
HSL	hsl(251, 65%, 33%)
HSV	hsv(251, 79%, 54%)
CMYK	cmyk(64.5%, 79%, 0%, 45.9%)
CIE-LAB	lab(21.45, 40.82, -56.83)
CIE-LCH	lch(21.45, 69.98, 305.69°)
OKLab	oklab(34.1% 0.0326 -0.164)
OKLCH	oklch(34.1% 0.167 281.2)
XYZ	xyz(6.2920, 3.3662, 24.3580)
Luminance	0.0337 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311D8A #768A1D

analogous

#1D408A #311D8A #671D8A

triadic

#311D8A #8A311D #1D8A31

tetradic

#311D8A #8A1D40 #768A1D #1D8A67

square

#311D8A #8A1D40 #768A1D #1D8A67

split-complementary

#311D8A #8A671D #408A1D

monochromatic

#0D0825 #1F1257 #311D8A #4328BD #6349D9

Accessibility & contrast

On white

12.55

#311D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#311D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311D8A

12.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311D8A	#FFFFFF	#000000	##FFFFFF
##311D8A	1.00	12.55	1.67	12.55
#FFFFFF	12.55	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378D

Deuteranopia (green-blind)

#002F88

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #311d8a;
/* rgb */ color: rgb(49, 29, 138);
/* oklch */ color: oklch(34.1% 0.167 281.2);

Tailwind

colors: {
  custom: {
    50: '#765cad',
    500: '#311d8a',
    950: '#000000',
  },
}

SCSS

$custom: #311d8a;
$custom-light: #765cad;
$custom-dark: #000000;

JSON

{
  "hex": "#311d8a",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 138
  },
  "hsl": {
    "h": 251.009,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.34103,
    "c": 0.1672,
    "h": 281.2
  },
  "luminance": 0.03367
}

Semantic roles & 50–950 ramp

primary

#311D8A

secondary

#A6BB48

accent

#E840C9

background

#F7F5FA

surface

#EEE9F4

border

#C9C5CE

text

#0A0410

muted

#7C797F

Preview Lab

Preview with #311D8A

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

Preview Lab → · Contrast checker → · Palette generator →