#311B9E#311B9E

#311B9E is a dark, vivid violet. Relative luminance 0.039; OKLCH L 36.1% C 0.193 H 278.2°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#311B9E
RGB	rgb(49, 27, 158)
HSL	hsl(250, 71%, 36%)
HSV	hsv(250, 83%, 62%)
CMYK	cmyk(69%, 82.9%, 0%, 38%)
CIE-LAB	lab(23.35, 47.91, -66.06)
CIE-LCH	lch(23.35, 81.60, 305.95°)
OKLab	oklab(36.08% 0.0276 -0.1908)
OKLCH	oklch(36.08% 0.193 278.2)
XYZ	xyz(7.8281, 3.9048, 32.6823)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B9E #889E1B

analogous

#1B479E #311B9E #731B9E

triadic

#311B9E #9E311B #1B9E31

tetradic

#311B9E #9E1B47 #889E1B #1B9E73

square

#311B9E #9E1B47 #889E1B #1B9E73

split-complementary

#311B9E #9E731B #479E1B

monochromatic

#110935 #21126A #311B9E #4124D2 #6A52E1

Accessibility & contrast

On white

11.79

#311B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#311B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B9E

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B9E	#FFFFFF	#000000	##FFFFFF
##311B9E	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA2

Deuteranopia (green-blind)

#00329C

Tritanopia (blue-blind)

#00445E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #311b9e;
/* rgb */ color: rgb(49, 27, 158);
/* oklch */ color: oklch(36.1% 0.193 278.2);

Tailwind

colors: {
  custom: {
    50: '#7a5dbc',
    500: '#311b9e',
    950: '#000000',
  },
}

SCSS

$custom: #311b9e;
$custom-light: #7a5dbc;
$custom-dark: #000000;

JSON

{
  "hex": "#311b9e",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 158
  },
  "hsl": {
    "h": 250.076,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.36082,
    "c": 0.1928,
    "h": 278.2
  },
  "luminance": 0.03905
}

Semantic roles & 50–950 ramp

primary

#311B9E

secondary

#B1C451

accent

#EE3ACF

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0412

muted

#7C7981

Preview Lab

Preview with #311B9E

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

Preview Lab → · Contrast checker → · Palette generator →