#311B80#311B80

#311B80 is a dark, vivid violet. Relative luminance 0.030; OKLCH L 32.8% C 0.157 H 283.6°. Best body text is #FFFFFF at 13.13:1 contrast (WCAG AA passes).

Color values

HEX	#311B80
RGB	rgb(49, 27, 128)
HSL	hsl(253, 65%, 30%)
HSV	hsv(253, 79%, 50%)
CMYK	cmyk(61.7%, 78.9%, 0%, 49.8%)
CIE-LAB	lab(20.02, 38.75, -52.90)
CIE-LCH	lch(20.02, 65.57, 306.22°)
OKLab	oklab(32.78% 0.0368 -0.1525)
OKLCH	oklch(32.78% 0.157 283.6)
XYZ	xyz(5.5536, 2.9950, 20.7033)
Luminance	0.0300 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B80 #6A801B

analogous

#1B3880 #311B80 #631B80

triadic

#311B80 #80311B #1B8031

tetradic

#311B80 #801B38 #6A801B #1B8063

square

#311B80 #801B38 #6A801B #1B8063

split-complementary

#311B80 #80631B #38801B

monochromatic

#0A061B #1E104D #311B80 #4426B3 #603FD6

Accessibility & contrast

On white

13.13

#311B80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#311B80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B80

13.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B80	#FFFFFF	#000000	##FFFFFF
##311B80	1.00	13.13	1.60	13.13
#FFFFFF	13.13	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003383

Deuteranopia (green-blind)

#002D7E

Tritanopia (blue-blind)

#00384D

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #311b80;
/* rgb */ color: rgb(49, 27, 128);
/* oklch */ color: oklch(32.8% 0.157 283.6);

Tailwind

colors: {
  custom: {
    50: '#745ba6',
    500: '#311b80',
    950: '#000000',
  },
}

SCSS

$custom: #311b80;
$custom-light: #745ba6;
$custom-dark: #000000;

JSON

{
  "hex": "#311b80",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 128
  },
  "hsl": {
    "h": 253.069,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.32782,
    "c": 0.15684,
    "h": 283.6
  },
  "luminance": 0.02995
}

Semantic roles & 50–950 ramp

primary

#311B80

secondary

#9BB443

accent

#E840C3

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#09040F

muted

#7B797F

Preview Lab

Preview with #311B80

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

Preview Lab → · Contrast checker → · Palette generator →