#311B9B#311B9B

#311B9B is a dark, vivid violet. Relative luminance 0.038; OKLCH L 35.7% C 0.189 H 278.7°. Best body text is #FFFFFF at 11.93:1 contrast (WCAG AA passes).

Color values

HEX	#311B9B
RGB	rgb(49, 27, 155)
HSL	hsl(250, 70%, 36%)
HSV	hsv(250, 83%, 61%)
CMYK	cmyk(68.4%, 82.6%, 0%, 39.2%)
CIE-LAB	lab(23.01, 47.01, -64.79)
CIE-LCH	lch(23.01, 80.05, 305.96°)
OKLab	oklab(35.74% 0.0286 -0.1871)
OKLCH	oklch(35.74% 0.189 278.7)
XYZ	xyz(7.5730, 3.8027, 31.3389)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B9B #859B1B

analogous

#1B459B #311B9B #711B9B

triadic

#311B9B #9B311B #1B9B31

tetradic

#311B9B #9B1B45 #859B1B #1B9B71

square

#311B9B #9B1B45 #859B1B #1B9B71

split-complementary

#311B9B #9B711B #459B1B

monochromatic

#100933 #211267 #311B9B #4124CF #6950E0

Accessibility & contrast

On white

11.93

#311B9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#311B9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B9B

11.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B9B	#FFFFFF	#000000	##FFFFFF
##311B9B	1.00	11.93	1.76	11.93
#FFFFFF	11.93	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9E

Deuteranopia (green-blind)

#003299

Tritanopia (blue-blind)

#00435C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #311b9b;
/* rgb */ color: rgb(49, 27, 155);
/* oklch */ color: oklch(35.7% 0.189 278.7);

Tailwind

colors: {
  custom: {
    50: '#7a5cba',
    500: '#311b9b',
    950: '#000000',
  },
}

SCSS

$custom: #311b9b;
$custom-light: #7a5cba;
$custom-dark: #000000;

JSON

{
  "hex": "#311b9b",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 155
  },
  "hsl": {
    "h": 250.313,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.35742,
    "c": 0.1893,
    "h": 278.7
  },
  "luminance": 0.03803
}

Semantic roles & 50–950 ramp

primary

#311B9B

secondary

#AFC34F

accent

#ED3BCE

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311B9B

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

Preview Lab → · Contrast checker → · Palette generator →