#311B79#311B79

#311B79 is a dark, vivid violet. Relative luminance 0.028; OKLCH L 32.1% C 0.148 H 285.2°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#311B79
RGB	rgb(49, 27, 121)
HSL	hsl(254, 64%, 29%)
HSV	hsv(254, 78%, 47%)
CMYK	cmyk(59.5%, 77.7%, 0%, 52.5%)
CIE-LAB	lab(19.30, 36.56, -49.64)
CIE-LCH	lch(19.30, 61.65, 306.37°)
OKLab	oklab(32.05% 0.0387 -0.1429)
OKLCH	oklch(32.05% 0.148 285.2)
XYZ	xyz(5.1087, 2.8170, 18.3600)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B79 #63791B

analogous

#1B3479 #311B79 #601B79

triadic

#311B79 #79311B #1B7931

tetradic

#311B79 #791B34 #63791B #1B7960

square

#311B79 #791B34 #63791B #1B7960

split-complementary

#311B79 #79601B #34791B

monochromatic

#0A0619 #1D1047 #311B79 #4526AB #5F3BD3

Accessibility & contrast

On white

13.43

#311B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#311B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B79

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B79	#FFFFFF	#000000	##FFFFFF
##311B79	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317C

Deuteranopia (green-blind)

#002C77

Tritanopia (blue-blind)

#0C3549

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #311b79;
/* rgb */ color: rgb(49, 27, 121);
/* oklch */ color: oklch(32.1% 0.148 285.2);

Tailwind

colors: {
  custom: {
    50: '#725aa1',
    500: '#311b79',
    950: '#000000',
  },
}

SCSS

$custom: #311b79;
$custom-light: #725aa1;
$custom-dark: #000000;

JSON

{
  "hex": "#311b79",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 121
  },
  "hsl": {
    "h": 254.043,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.32051,
    "c": 0.1481,
    "h": 285.2
  },
  "luminance": 0.02817
}

Semantic roles & 50–950 ramp

primary

#311B79

secondary

#94AD43

accent

#E741C0

background

#F7F5FA

surface

#EDE9F3

border

#C8C5CD

text

#09040F

muted

#7B797F

Preview Lab

Preview with #311B79

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

Preview Lab → · Contrast checker → · Palette generator →