#311B73#311B73

#311B73 is a dark, vivid violet. Relative luminance 0.027; OKLCH L 31.4% C 0.140 H 286.7°. Best body text is #FFFFFF at 13.68:1 contrast (WCAG AA passes).

Color values

HEX	#311B73
RGB	rgb(49, 27, 115)
HSL	hsl(255, 62%, 28%)
HSV	hsv(255, 77%, 45%)
CMYK	cmyk(57.4%, 76.5%, 0%, 54.9%)
CIE-LAB	lab(18.69, 34.67, -46.78)
CIE-LCH	lch(18.69, 58.23, 306.55°)
OKLab	oklab(31.44% 0.0403 -0.1346)
OKLCH	oklch(31.44% 0.14 286.7)
XYZ	xyz(4.7521, 2.6744, 16.4821)
Luminance	0.0267 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B73 #5D731B

analogous

#1B3173 #311B73 #5D1B73

triadic

#311B73 #73311B #1B7331

tetradic

#311B73 #731B31 #5D731B #1B735D

square

#311B73 #731B31 #5D731B #1B735D

split-complementary

#311B73 #735D1B #31731B

monochromatic

#0B0619 #1C0F41 #311B73 #4627A5 #5E38D0

Accessibility & contrast

On white

13.68

#311B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#311B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B73

13.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B73	#FFFFFF	#000000	##FFFFFF
##311B73	1.00	13.68	1.54	13.68
#FFFFFF	13.68	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003076

Deuteranopia (green-blind)

#002B71

Tritanopia (blue-blind)

#143345

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #311b73;
/* rgb */ color: rgb(49, 27, 115);
/* oklch */ color: oklch(31.4% 0.140 286.7);

Tailwind

colors: {
  custom: {
    50: '#715a9c',
    500: '#311b73',
    950: '#000000',
  },
}

SCSS

$custom: #311b73;
$custom-light: #715a9c;
$custom-dark: #000000;

JSON

{
  "hex": "#311b73",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 115
  },
  "hsl": {
    "h": 255,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.3144,
    "c": 0.14048,
    "h": 286.7
  },
  "luminance": 0.02675
}

Semantic roles & 50–950 ramp

primary

#311B73

secondary

#8EA842

accent

#E543BC

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040E

muted

#7B797E

Preview Lab

Preview with #311B73

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

Preview Lab → · Contrast checker → · Palette generator →