#311B8F#311B8F

#311B8F is a dark, vivid violet. Relative luminance 0.034; OKLCH L 34.4% C 0.175 H 280.6°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#311B8F
RGB	rgb(49, 27, 143)
HSL	hsl(251, 68%, 33%)
HSV	hsv(251, 81%, 56%)
CMYK	cmyk(65.7%, 81.1%, 0%, 43.9%)
CIE-LAB	lab(21.65, 43.38, -59.63)
CIE-LCH	lch(21.65, 73.74, 306.03°)
OKLab	oklab(34.4% 0.0323 -0.1721)
OKLCH	oklch(34.4% 0.175 280.6)
XYZ	xyz(6.6149, 3.4195, 26.2927)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311B8F #798F1B

analogous

#1B3F8F #311B8F #6B1B8F

triadic

#311B8F #8F311B #1B8F31

tetradic

#311B8F #8F1B3F #798F1B #1B8F6B

square

#311B8F #8F1B3F #798F1B #1B8F6B

split-complementary

#311B8F #8F6B1B #3F8F1B

monochromatic

#0E0828 #1F115C #311B8F #4325C2 #6448DC

Accessibility & contrast

On white

12.47

#311B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#311B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311B8F

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311B8F	#FFFFFF	#000000	##FFFFFF
##311B8F	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003892

Deuteranopia (green-blind)

#00308D

Tritanopia (blue-blind)

#003E55

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #311b8f;
/* rgb */ color: rgb(49, 27, 143);
/* oklch */ color: oklch(34.4% 0.175 280.6);

Tailwind

colors: {
  custom: {
    50: '#775bb1',
    500: '#311b8f',
    950: '#000000',
  },
}

SCSS

$custom: #311b8f;
$custom-light: #775bb1;
$custom-dark: #000000;

JSON

{
  "hex": "#311b8f",
  "rgb": {
    "r": 49,
    "g": 27,
    "b": 143
  },
  "hsl": {
    "h": 251.379,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34403,
    "c": 0.1751,
    "h": 280.6
  },
  "luminance": 0.0342
}

Semantic roles & 50–950 ramp

primary

#311B8F

secondary

#A8BE48

accent

#EB3DCA

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0411

muted

#7C7980

Preview Lab

Preview with #311B8F

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

Preview Lab → · Contrast checker → · Palette generator →