#311B71#311B71

#311B71 is a dark, vivid violet. Relative luminance 0.026; OKLCH L 31.2% C 0.138 H 287.2°. Best body text is #FFFFFF at 13.76:1 contrast (WCAG AA passes).

Color values

HEX	#311B71
RGB	rgb(49, 27, 113)
HSL	hsl(255, 61%, 27%)
HSV	hsv(255, 76%, 44%)
CMYK	cmyk(56.6%, 76.1%, 0%, 55.7%)
CIE-LAB	lab(18.49, 34.05, -45.81)
CIE-LCH	lch(18.49, 57.08, 306.62°)
OKLab	oklab(31.24% 0.0408 -0.1317)
OKLCH	oklch(31.24% 0.138 287.2)
XYZ	xyz(4.6383, 2.6288, 15.8826)
Luminance	0.0263 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B71 #5B711B

analogous

#1B3071 #311B71 #5C1B71

triadic

#311B71 #71311B #1B7131

tetradic

#311B71 #711B30 #5B711B #1B715C

square

#311B71 #711B30 #5B711B #1B715C

split-complementary

#311B71 #715C1B #30711B

monochromatic

#0B0619 #1C0F40 #311B71 #4627A2 #5E37CF

Accessibility & contrast

On white

13.76

#311B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#311B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B71

13.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B71	#FFFFFF	#000000	##FFFFFF
##311B71	1.00	13.76	1.53	13.76
#FFFFFF	13.76	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F74

Deuteranopia (green-blind)

#002B6F

Tritanopia (blue-blind)

#163244

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #311b71;
/* rgb */ color: rgb(49, 27, 113);
/* oklch */ color: oklch(31.2% 0.138 287.2);

Tailwind

colors: {
  custom: {
    50: '#715a9b',
    500: '#311b71',
    950: '#000000',
  },
}

SCSS

$custom: #311b71;
$custom-light: #715a9b;
$custom-dark: #000000;

JSON

{
  "hex": "#311b71",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 113
  },
  "hsl": {
    "h": 255.349,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.31239,
    "c": 0.13792,
    "h": 287.2
  },
  "luminance": 0.02629
}

Semantic roles & 50–950 ramp

primary

#311B71

secondary

#8CA642

accent

#E543BB

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040E

muted

#7B797E

Preview Lab

Preview with #311B71

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

Preview Lab → · Contrast checker → · Palette generator →