#311B8E#311B8E

#311B8E is a dark, vivid violet. Relative luminance 0.034; OKLCH L 34.3% C 0.174 H 280.8°. Best body text is #FFFFFF at 12.51:1 contrast (WCAG AA passes).

Color values

HEX	#311B8E
RGB	rgb(49, 27, 142)
HSL	hsl(251, 68%, 33%)
HSV	hsv(251, 81%, 56%)
CMYK	cmyk(65.5%, 81%, 0%, 44.3%)
CIE-LAB	lab(21.54, 43.07, -59.19)
CIE-LCH	lch(21.54, 73.20, 306.04°)
OKLab	oklab(34.29% 0.0326 -0.1708)
OKLCH	oklch(34.29% 0.174 280.8)
XYZ	xyz(6.5395, 3.3893, 25.8955)
Luminance	0.0339 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B8E #788E1B

analogous

#1B3F8E #311B8E #6A1B8E

triadic

#311B8E #8E311B #1B8E31

tetradic

#311B8E #8E1B3F #788E1B #1B8E6A

square

#311B8E #8E1B3F #788E1B #1B8E6A

split-complementary

#311B8E #8E6A1B #3F8E1B

monochromatic

#0E0727 #1F115B #311B8E #4325C1 #6447DC

Accessibility & contrast

On white

12.51

#311B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#311B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B8E

12.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B8E	#FFFFFF	#000000	##FFFFFF
##311B8E	1.00	12.51	1.68	12.51
#FFFFFF	12.51	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003891

Deuteranopia (green-blind)

#002F8C

Tritanopia (blue-blind)

#003E55

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #311b8e;
/* rgb */ color: rgb(49, 27, 142);
/* oklch */ color: oklch(34.3% 0.174 280.8);

Tailwind

colors: {
  custom: {
    50: '#775bb0',
    500: '#311b8e',
    950: '#000000',
  },
}

SCSS

$custom: #311b8e;
$custom-light: #775bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#311b8e",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 142
  },
  "hsl": {
    "h": 251.478,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34293,
    "c": 0.17391,
    "h": 280.8
  },
  "luminance": 0.0339
}

Semantic roles & 50–950 ramp

primary

#311B8E

secondary

#A7BE47

accent

#EB3DCA

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311B8E

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

Preview Lab → · Contrast checker → · Palette generator →