#311B76#311B76

#311B76 is a dark, vivid violet. Relative luminance 0.027; OKLCH L 31.7% C 0.144 H 285.9°. Best body text is #FFFFFF at 13.56:1 contrast (WCAG AA passes).

Color values

HEX	#311B76
RGB	rgb(49, 27, 118)
HSL	hsl(255, 63%, 28%)
HSV	hsv(255, 77%, 46%)
CMYK	cmyk(58.5%, 77.1%, 0%, 53.7%)
CIE-LAB	lab(18.99, 35.62, -48.22)
CIE-LCH	lch(18.99, 59.95, 306.45°)
OKLab	oklab(31.74% 0.0395 -0.1388)
OKLCH	oklch(31.74% 0.144 285.9)
XYZ	xyz(4.9276, 2.7446, 17.4061)
Luminance	0.0274 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B76 #60761B

analogous

#1B3276 #311B76 #5E1B76

triadic

#311B76 #76311B #1B7631

tetradic

#311B76 #761B32 #60761B #1B765E

square

#311B76 #761B32 #60761B #1B765E

split-complementary

#311B76 #765E1B #32761B

monochromatic

#0A0619 #1C1044 #311B76 #4626A8 #5E3AD2

Accessibility & contrast

On white

13.56

#311B76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#311B76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B76

13.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B76	#FFFFFF	#000000	##FFFFFF
##311B76	1.00	13.56	1.55	13.56
#FFFFFF	13.56	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003079

Deuteranopia (green-blind)

#002B74

Tritanopia (blue-blind)

#103447

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #311b76;
/* rgb */ color: rgb(49, 27, 118);
/* oklch */ color: oklch(31.7% 0.144 285.9);

Tailwind

colors: {
  custom: {
    50: '#725a9e',
    500: '#311b76',
    950: '#000000',
  },
}

SCSS

$custom: #311b76;
$custom-light: #725a9e;
$custom-dark: #000000;

JSON

{
  "hex": "#311b76",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 118
  },
  "hsl": {
    "h": 254.505,
    "s": 62.759,
    "l": 28.431
  },
  "oklch": {
    "l": 0.31744,
    "c": 0.14431,
    "h": 285.9
  },
  "luminance": 0.02745
}

Semantic roles & 50–950 ramp

primary

#311B76

secondary

#91AA42

accent

#E642BE

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#09040E

muted

#7B797E

Preview Lab

Preview with #311B76

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

Preview Lab → · Contrast checker → · Palette generator →