#311B72#311B72

#311B72 is a dark, vivid violet. Relative luminance 0.027; OKLCH L 31.3% C 0.139 H 286.9°. Best body text is #FFFFFF at 13.72:1 contrast (WCAG AA passes).

Color values

HEX	#311B72
RGB	rgb(49, 27, 114)
HSL	hsl(255, 62%, 28%)
HSV	hsv(255, 76%, 45%)
CMYK	cmyk(57%, 76.3%, 0%, 55.3%)
CIE-LAB	lab(18.59, 34.36, -46.30)
CIE-LCH	lch(18.59, 57.65, 306.58°)
OKLab	oklab(31.34% 0.0406 -0.1332)
OKLCH	oklch(31.34% 0.139 286.9)
XYZ	xyz(4.6949, 2.6515, 16.1807)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B72 #5C721B

analogous

#1B3172 #311B72 #5C1B72

triadic

#311B72 #72311B #1B7231

tetradic

#311B72 #721B31 #5C721B #1B725C

square

#311B72 #721B31 #5C721B #1B725C

split-complementary

#311B72 #725C1B #31721B

monochromatic

#0B0619 #1C0F41 #311B72 #4627A3 #5E38D0

Accessibility & contrast

On white

13.72

#311B72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#311B72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B72

13.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B72	#FFFFFF	#000000	##FFFFFF
##311B72	1.00	13.72	1.53	13.72
#FFFFFF	13.72	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F75

Deuteranopia (green-blind)

#002B70

Tritanopia (blue-blind)

#153345

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #311b72;
/* rgb */ color: rgb(49, 27, 114);
/* oklch */ color: oklch(31.3% 0.139 286.9);

Tailwind

colors: {
  custom: {
    50: '#715a9b',
    500: '#311b72',
    950: '#000000',
  },
}

SCSS

$custom: #311b72;
$custom-light: #715a9b;
$custom-dark: #000000;

JSON

{
  "hex": "#311b72",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 114
  },
  "hsl": {
    "h": 255.172,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.31339,
    "c": 0.13921,
    "h": 286.9
  },
  "luminance": 0.02652
}

Semantic roles & 50–950 ramp

primary

#311B72

secondary

#8DA742

accent

#E543BC

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040E

muted

#7B797E

Preview Lab

Preview with #311B72

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

Preview Lab → · Contrast checker → · Palette generator →