#311B78#311B78

#311B78 is a dark, vivid violet. Relative luminance 0.028; OKLCH L 31.9% C 0.147 H 285.4°. Best body text is #FFFFFF at 13.47:1 contrast (WCAG AA passes).

Color values

HEX	#311B78
RGB	rgb(49, 27, 120)
HSL	hsl(254, 63%, 29%)
HSV	hsv(254, 78%, 47%)
CMYK	cmyk(59.2%, 77.5%, 0%, 52.9%)
CIE-LAB	lab(19.19, 36.25, -49.17)
CIE-LCH	lch(19.19, 61.08, 306.40°)
OKLab	oklab(31.95% 0.039 -0.1416)
OKLCH	oklch(31.95% 0.147 285.4)
XYZ	xyz(5.0477, 2.7926, 18.0387)
Luminance	0.0279 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B78 #62781B

analogous

#1B3478 #311B78 #601B78

triadic

#311B78 #78311B #1B7831

tetradic

#311B78 #781B34 #62781B #1B7860

square

#311B78 #781B34 #62781B #1B7860

split-complementary

#311B78 #78601B #34781B

monochromatic

#0A0619 #1D1046 #311B78 #4526AA #5F3BD3

Accessibility & contrast

On white

13.47

#311B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#311B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B78

13.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B78	#FFFFFF	#000000	##FFFFFF
##311B78	1.00	13.47	1.56	13.47
#FFFFFF	13.47	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317B

Deuteranopia (green-blind)

#002C76

Tritanopia (blue-blind)

#0D3548

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #311b78;
/* rgb */ color: rgb(49, 27, 120);
/* oklch */ color: oklch(31.9% 0.147 285.4);

Tailwind

colors: {
  custom: {
    50: '#725aa0',
    500: '#311b78',
    950: '#000000',
  },
}

SCSS

$custom: #311b78;
$custom-light: #725aa0;
$custom-dark: #000000;

JSON

{
  "hex": "#311b78",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 120
  },
  "hsl": {
    "h": 254.194,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.31948,
    "c": 0.14684,
    "h": 285.4
  },
  "luminance": 0.02793
}

Semantic roles & 50–950 ramp

primary

#311B78

secondary

#93AC43

accent

#E641BF

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#09040F

muted

#7B797E

Preview Lab

Preview with #311B78

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

Preview Lab → · Contrast checker → · Palette generator →