#311B99#311B99

#311B99 is a dark, vivid violet. Relative luminance 0.037; OKLCH L 35.5% C 0.187 H 279.0°. Best body text is #FFFFFF at 12.02:1 contrast (WCAG AA passes).

Color values

HEX	#311B99
RGB	rgb(49, 27, 153)
HSL	hsl(250, 70%, 35%)
HSV	hsv(250, 82%, 60%)
CMYK	cmyk(68%, 82.4%, 0%, 40%)
CIE-LAB	lab(22.78, 46.41, -63.95)
CIE-LCH	lch(22.78, 79.01, 305.97°)
OKLab	oklab(35.52% 0.0292 -0.1847)
OKLCH	oklch(35.52% 0.187 279)
XYZ	xyz(7.4065, 3.7361, 30.4616)
Luminance	0.0374 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B99 #83991B

analogous

#1B4499 #311B99 #701B99

triadic

#311B99 #99311B #1B9931

tetradic

#311B99 #991B44 #83991B #1B9970

square

#311B99 #991B44 #83991B #1B9970

split-complementary

#311B99 #99701B #44991B

monochromatic

#100931 #201265 #311B99 #4224CD #684FE0

Accessibility & contrast

On white

12.02

#311B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#311B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B99

12.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B99	#FFFFFF	#000000	##FFFFFF
##311B99	1.00	12.02	1.75	12.02
#FFFFFF	12.02	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B9C

Deuteranopia (green-blind)

#003197

Tritanopia (blue-blind)

#00425B

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #311b99;
/* rgb */ color: rgb(49, 27, 153);
/* oklch */ color: oklch(35.5% 0.187 279.0);

Tailwind

colors: {
  custom: {
    50: '#795cb8',
    500: '#311b99',
    950: '#000000',
  },
}

SCSS

$custom: #311b99;
$custom-light: #795cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#311b99",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 153
  },
  "hsl": {
    "h": 250.476,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.35517,
    "c": 0.18696,
    "h": 279
  },
  "luminance": 0.03737
}

Semantic roles & 50–950 ramp

primary

#311B99

secondary

#AEC24E

accent

#ED3BCE

background

#F8F5FB

surface

#EFE9F6

border

#CAC5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #311B99

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

Preview Lab → · Contrast checker → · Palette generator →