#331B7C#331B7C

#331B7C is a dark, vivid violet. Relative luminance 0.029; OKLCH L 32.6% C 0.152 H 285.7°. Best body text is #FFFFFF at 13.22:1 contrast (WCAG AA passes).

Color values

HEX	#331B7C
RGB	rgb(51, 27, 124)
HSL	hsl(255, 64%, 30%)
HSV	hsv(255, 78%, 49%)
CMYK	cmyk(58.9%, 78.2%, 0%, 51.4%)
CIE-LAB	lab(19.81, 37.78, -50.70)
CIE-LCH	lch(19.81, 63.23, 306.70°)
OKLab	oklab(32.56% 0.0411 -0.146)
OKLCH	oklch(32.56% 0.152 285.7)
XYZ	xyz(5.3942, 2.9426, 19.3486)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B7C #647C1B

analogous

#1B347C #331B7C #631B7C

triadic

#331B7C #7C331B #1B7C33

tetradic

#331B7C #7C1B34 #647C1B #1B7C63

square

#331B7C #7C1B34 #647C1B #1B7C63

split-complementary

#331B7C #7C631B #347C1B

monochromatic

#0A0519 #1E104A #331B7C #4826AE #623DD5

Accessibility & contrast

On white

13.22

#331B7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#331B7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B7C

13.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B7C	#FFFFFF	#000000	##FFFFFF
##331B7C	1.00	13.22	1.59	13.22
#FFFFFF	13.22	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327F

Deuteranopia (green-blind)

#002D7A

Tritanopia (blue-blind)

#0F364A

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #331b7c;
/* rgb */ color: rgb(51, 27, 124);
/* oklch */ color: oklch(32.6% 0.152 285.7);

Tailwind

colors: {
  custom: {
    50: '#745aa3',
    500: '#331b7c',
    950: '#000000',
  },
}

SCSS

$custom: #331b7c;
$custom-light: #745aa3;
$custom-dark: #000000;

JSON

{
  "hex": "#331b7c",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 124
  },
  "hsl": {
    "h": 254.845,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.32558,
    "c": 0.15165,
    "h": 285.7
  },
  "luminance": 0.02943
}

Semantic roles & 50–950 ramp

primary

#331B7C

secondary

#95B043

accent

#E741BE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#09040F

muted

#7B797F

Preview Lab

Preview with #331B7C

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

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