#311B7B#311B7B

#311B7B is a dark, vivid violet. Relative luminance 0.029; OKLCH L 32.3% C 0.151 H 284.7°. Best body text is #FFFFFF at 13.35:1 contrast (WCAG AA passes).

Color values

HEX	#311B7B
RGB	rgb(49, 27, 123)
HSL	hsl(254, 64%, 29%)
HSV	hsv(254, 78%, 48%)
CMYK	cmyk(60.2%, 78%, 0%, 51.8%)
CIE-LAB	lab(19.50, 37.18, -50.58)
CIE-LCH	lch(19.50, 62.78, 306.32°)
OKLab	oklab(32.26% 0.0382 -0.1457)
OKLCH	oklch(32.26% 0.151 284.7)
XYZ	xyz(5.2326, 2.8666, 19.0126)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B7B #657B1B

analogous

#1B357B #311B7B #611B7B

triadic

#311B7B #7B311B #1B7B31

tetradic

#311B7B #7B1B35 #657B1B #1B7B61

square

#311B7B #7B1B35 #657B1B #1B7B61

split-complementary

#311B7B #7B611B #357B1B

monochromatic

#0A0619 #1D1049 #311B7B #4526AD #5F3CD4

Accessibility & contrast

On white

13.35

#311B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#311B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B7B

13.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B7B	#FFFFFF	#000000	##FFFFFF
##311B7B	1.00	13.35	1.57	13.35
#FFFFFF	13.35	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00327E

Deuteranopia (green-blind)

#002C79

Tritanopia (blue-blind)

#08364A

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #311b7b;
/* rgb */ color: rgb(49, 27, 123);
/* oklch */ color: oklch(32.3% 0.151 284.7);

Tailwind

colors: {
  custom: {
    50: '#735aa2',
    500: '#311b7b',
    950: '#000000',
  },
}

SCSS

$custom: #311b7b;
$custom-light: #735aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#311b7b",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 123
  },
  "hsl": {
    "h": 253.75,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.32258,
    "c": 0.15062,
    "h": 284.7
  },
  "luminance": 0.02867
}

Semantic roles & 50–950 ramp

primary

#311B7B

secondary

#96AF43

accent

#E741C1

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#09040F

muted

#7B797F

Preview Lab

Preview with #311B7B

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

Preview Lab → · Contrast checker → · Palette generator →