#331B75#331B75

#331B75 is a dark, vivid violet. Relative luminance 0.028; OKLCH L 31.8% C 0.143 H 287.5°. Best body text is #FFFFFF at 13.51:1 contrast (WCAG AA passes).

Color values

HEX	#331B75
RGB	rgb(51, 27, 117)
HSL	hsl(256, 63%, 28%)
HSV	hsv(256, 77%, 46%)
CMYK	cmyk(56.4%, 76.9%, 0%, 54.1%)
CIE-LAB	lab(19.11, 35.62, -47.38)
CIE-LCH	lch(19.11, 59.27, 306.94°)
OKLab	oklab(31.85% 0.043 -0.1363)
OKLCH	oklch(31.85% 0.143 287.5)
XYZ	xyz(4.9671, 2.7718, 17.0994)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B75 #5D751B

analogous

#1B3075 #331B75 #601B75

triadic

#331B75 #75331B #1B7533

tetradic

#331B75 #751B30 #5D751B #1B7560

square

#331B75 #751B30 #5D751B #1B7560

split-complementary

#331B75 #75601B #30751B

monochromatic

#0B0619 #1D1043 #331B75 #4926A7 #6239D1

Accessibility & contrast

On white

13.51

#331B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#331B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B75

13.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B75	#FFFFFF	#000000	##FFFFFF
##331B75	1.00	13.51	1.55	13.51
#FFFFFF	13.51	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003078

Deuteranopia (green-blind)

#002C73

Tritanopia (blue-blind)

#183446

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #331b75;
/* rgb */ color: rgb(51, 27, 117);
/* oklch */ color: oklch(31.8% 0.143 287.5);

Tailwind

colors: {
  custom: {
    50: '#735a9e',
    500: '#331b75',
    950: '#000000',
  },
}

SCSS

$custom: #331b75;
$custom-light: #735a9e;
$custom-dark: #000000;

JSON

{
  "hex": "#331b75",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 117
  },
  "hsl": {
    "h": 256,
    "s": 62.5,
    "l": 28.235
  },
  "oklch": {
    "l": 0.31846,
    "c": 0.14287,
    "h": 287.5
  },
  "luminance": 0.02772
}

Semantic roles & 50–950 ramp

primary

#331B75

secondary

#8EA942

accent

#E642BA

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#09040E

muted

#7B797E

Preview Lab

Preview with #331B75

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

Preview Lab → · Contrast checker → · Palette generator →