#311B8D#311B8D

#311B8D is a dark, vivid violet. Relative luminance 0.034; OKLCH L 34.2% C 0.173 H 281.0°. Best body text is #FFFFFF at 12.56:1 contrast (WCAG AA passes).

Color values

HEX	#311B8D
RGB	rgb(49, 27, 141)
HSL	hsl(252, 68%, 33%)
HSV	hsv(252, 81%, 55%)
CMYK	cmyk(65.2%, 80.9%, 0%, 44.7%)
CIE-LAB	lab(21.43, 42.77, -58.75)
CIE-LCH	lch(21.43, 72.67, 306.05°)
OKLab	oklab(34.18% 0.0329 -0.1695)
OKLCH	oklch(34.18% 0.173 281)
XYZ	xyz(6.4648, 3.3594, 25.5019)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B8D #778D1B

analogous

#1B3E8D #311B8D #6A1B8D

triadic

#311B8D #8D311B #1B8D31

tetradic

#311B8D #8D1B3E #778D1B #1B8D6A

square

#311B8D #8D1B3E #778D1B #1B8D6A

split-complementary

#311B8D #8D6A1B #3E8D1B

monochromatic

#0D0726 #1F115A #311B8D #4325C0 #6347DC

Accessibility & contrast

On white

12.56

#311B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#311B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B8D

12.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B8D	#FFFFFF	#000000	##FFFFFF
##311B8D	1.00	12.56	1.67	12.56
#FFFFFF	12.56	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003790

Deuteranopia (green-blind)

#002F8B

Tritanopia (blue-blind)

#003D54

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #311b8d;
/* rgb */ color: rgb(49, 27, 141);
/* oklch */ color: oklch(34.2% 0.173 281.0);

Tailwind

colors: {
  custom: {
    50: '#775bb0',
    500: '#311b8d',
    950: '#000000',
  },
}

SCSS

$custom: #311b8d;
$custom-light: #775bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#311b8d",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 141
  },
  "hsl": {
    "h": 251.579,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.34183,
    "c": 0.1727,
    "h": 281
  },
  "luminance": 0.0336
}

Semantic roles & 50–950 ramp

primary

#311B8D

secondary

#A6BD46

accent

#EB3DC9

background

#F7F5FA

surface

#EEE9F5

border

#C9C5CF

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311B8D

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

Preview Lab → · Contrast checker → · Palette generator →