#311B90#311B90

#311B90 is a dark, vivid violet. Relative luminance 0.035; OKLCH L 34.5% C 0.176 H 280.5°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#311B90
RGB	rgb(49, 27, 144)
HSL	hsl(251, 68%, 34%)
HSV	hsv(251, 81%, 56%)
CMYK	cmyk(66%, 81.3%, 0%, 43.5%)
CIE-LAB	lab(21.76, 43.68, -60.07)
CIE-LCH	lch(21.76, 74.27, 306.03°)
OKLab	oklab(34.51% 0.032 -0.1734)
OKLCH	oklch(34.51% 0.176 280.5)
XYZ	xyz(6.6910, 3.4499, 26.6935)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B90 #7A901B

analogous

#1B3F90 #311B90 #6B1B90

triadic

#311B90 #90311B #1B9031

tetradic

#311B90 #901B3F #7A901B #1B906B

square

#311B90 #901B3F #7A901B #1B906B

split-complementary

#311B90 #906B1B #3F901B

monochromatic

#0E0829 #1F115C #311B90 #4325C4 #6449DD

Accessibility & contrast

On white

12.43

#311B90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#311B90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B90

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B90	#FFFFFF	#000000	##FFFFFF
##311B90	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003893

Deuteranopia (green-blind)

#00308E

Tritanopia (blue-blind)

#003F56

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #311b90;
/* rgb */ color: rgb(49, 27, 144);
/* oklch */ color: oklch(34.5% 0.176 280.5);

Tailwind

colors: {
  custom: {
    50: '#775cb2',
    500: '#311b90',
    950: '#000000',
  },
}

SCSS

$custom: #311b90;
$custom-light: #775cb2;
$custom-dark: #000000;

JSON

{
  "hex": "#311b90",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 144
  },
  "hsl": {
    "h": 251.282,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.34513,
    "c": 0.1763,
    "h": 280.5
  },
  "luminance": 0.0345
}

Semantic roles & 50–950 ramp

primary

#311B90

secondary

#A8BF48

accent

#EB3DCA

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311B90

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

Preview Lab → · Contrast checker → · Palette generator →