#311B88#311B88

#311B88 is a dark, vivid violet. Relative luminance 0.032; OKLCH L 33.6% C 0.167 H 281.9°. Best body text is #FFFFFF at 12.78:1 contrast (WCAG AA passes).

Color values

HEX	#311B88
RGB	rgb(49, 27, 136)
HSL	hsl(252, 67%, 32%)
HSV	hsv(252, 80%, 53%)
CMYK	cmyk(64%, 80.1%, 0%, 46.7%)
CIE-LAB	lab(20.88, 41.23, -56.53)
CIE-LCH	lch(20.88, 69.96, 306.10°)
OKLab	oklab(33.64% 0.0344 -0.1631)
OKLCH	oklch(33.64% 0.167 281.9)
XYZ	xyz(6.1011, 3.2140, 23.5866)
Luminance	0.0321 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B88 #72881B

analogous

#1B3C88 #311B88 #681B88

triadic

#311B88 #88311B #1B8831

tetradic

#311B88 #881B3C #72881B #1B8868

square

#311B88 #881B3C #72881B #1B8868

split-complementary

#311B88 #88681B #3C881B

monochromatic

#0C0722 #1F1155 #311B88 #4325BB #6244DA

Accessibility & contrast

On white

12.78

#311B88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#311B88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B88

12.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B88	#FFFFFF	#000000	##FFFFFF
##311B88	1.00	12.78	1.64	12.78
#FFFFFF	12.78	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368B

Deuteranopia (green-blind)

#002E86

Tritanopia (blue-blind)

#003B51

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #311b88;
/* rgb */ color: rgb(49, 27, 136);
/* oklch */ color: oklch(33.6% 0.167 281.9);

Tailwind

colors: {
  custom: {
    50: '#755bac',
    500: '#311b88',
    950: '#000000',
  },
}

SCSS

$custom: #311b88;
$custom-light: #755bac;
$custom-dark: #000000;

JSON

{
  "hex": "#311b88",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 136
  },
  "hsl": {
    "h": 252.11,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.33638,
    "c": 0.16666,
    "h": 281.9
  },
  "luminance": 0.03214
}

Semantic roles & 50–950 ramp

primary

#311B88

secondary

#A3BB44

accent

#EA3EC7

background

#F7F5FA

surface

#EEE9F4

border

#C9C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #311B88

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

Preview Lab → · Contrast checker → · Palette generator →