#311B9C#311B9C

#311B9C is a dark, vivid violet. Relative luminance 0.038; OKLCH L 35.9% C 0.190 H 278.5°. Best body text is #FFFFFF at 11.88:1 contrast (WCAG AA passes).

Color values

HEX	#311B9C
RGB	rgb(49, 27, 156)
HSL	hsl(250, 70%, 36%)
HSV	hsv(250, 83%, 61%)
CMYK	cmyk(68.6%, 82.7%, 0%, 38.8%)
CIE-LAB	lab(23.12, 47.31, -65.22)
CIE-LCH	lch(23.12, 80.57, 305.96°)
OKLab	oklab(35.85% 0.0282 -0.1884)
OKLCH	oklch(35.85% 0.19 278.5)
XYZ	xyz(7.6574, 3.8365, 31.7830)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B9C #869C1B

analogous

#1B459C #311B9C #711B9C

triadic

#311B9C #9C311B #1B9C31

tetradic

#311B9C #9C1B45 #869C1B #1B9C71

square

#311B9C #9C1B45 #869C1B #1B9C71

split-complementary

#311B9C #9C711B #459C1B

monochromatic

#100934 #211268 #311B9C #4124D0 #6951E1

Accessibility & contrast

On white

11.88

#311B9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#311B9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B9C

11.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B9C	#FFFFFF	#000000	##FFFFFF
##311B9C	1.00	11.88	1.77	11.88
#FFFFFF	11.88	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9F

Deuteranopia (green-blind)

#00329A

Tritanopia (blue-blind)

#00435D

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #311b9c;
/* rgb */ color: rgb(49, 27, 156);
/* oklch */ color: oklch(35.9% 0.190 278.5);

Tailwind

colors: {
  custom: {
    50: '#7a5cbb',
    500: '#311b9c',
    950: '#000000',
  },
}

SCSS

$custom: #311b9c;
$custom-light: #7a5cbb;
$custom-dark: #000000;

JSON

{
  "hex": "#311b9c",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 156
  },
  "hsl": {
    "h": 250.233,
    "s": 70.492,
    "l": 35.882
  },
  "oklch": {
    "l": 0.35855,
    "c": 0.19047,
    "h": 278.5
  },
  "luminance": 0.03837
}

Semantic roles & 50–950 ramp

primary

#311B9C

secondary

#B0C34F

accent

#ED3BCF

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311B9C

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

Preview Lab → · Contrast checker → · Palette generator →