#311D8B#311D8B

#311D8B is a dark, vivid violet. Relative luminance 0.034; OKLCH L 34.2% C 0.168 H 281.1°. Best body text is #FFFFFF at 12.51:1 contrast (WCAG AA passes).

Color values

HEX	#311D8B
RGB	rgb(49, 29, 139)
HSL	hsl(251, 65%, 33%)
HSV	hsv(251, 79%, 55%)
CMYK	cmyk(64.7%, 79.1%, 0%, 45.5%)
CIE-LAB	lab(21.56, 41.13, -57.28)
CIE-LCH	lch(21.56, 70.52, 305.68°)
OKLab	oklab(34.21% 0.0323 -0.1653)
OKLCH	oklch(34.21% 0.168 281.1)
XYZ	xyz(6.3647, 3.3953, 24.7410)
Luminance	0.0340 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311D8B #778B1D

analogous

#1D408B #311D8B #681D8B

triadic

#311D8B #8B311D #1D8B31

tetradic

#311D8B #8B1D40 #778B1D #1D8B68

square

#311D8B #8B1D40 #778B1D #1D8B68

split-complementary

#311D8B #8B681D #408B1D

monochromatic

#0D0826 #1F1258 #311D8B #4328BE #6349D9

Accessibility & contrast

On white

12.51

#311D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#311D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311D8B

12.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311D8B	#FFFFFF	#000000	##FFFFFF
##311D8B	1.00	12.51	1.68	12.51
#FFFFFF	12.51	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378E

Deuteranopia (green-blind)

#003089

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #311d8b;
/* rgb */ color: rgb(49, 29, 139);
/* oklch */ color: oklch(34.2% 0.168 281.1);

Tailwind

colors: {
  custom: {
    50: '#765cae',
    500: '#311d8b',
    950: '#000000',
  },
}

SCSS

$custom: #311d8b;
$custom-light: #765cae;
$custom-dark: #000000;

JSON

{
  "hex": "#311d8b",
  "rgb": {
    "r": 49,
    "g": 29,
    "b": 139
  },
  "hsl": {
    "h": 250.909,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.3421,
    "c": 0.16841,
    "h": 281.1
  },
  "luminance": 0.03396
}

Semantic roles & 50–950 ramp

primary

#311D8B

secondary

#A6BB49

accent

#E83FCA

background

#F7F5FA

surface

#EEE9F4

border

#C9C5CE

text

#0A0410

muted

#7C797F

Preview Lab

Preview with #311D8B

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

Preview Lab → · Contrast checker → · Palette generator →