#331B3B#331B3B

#331B3B is a dark, moderate purple. Relative luminance 0.018; OKLCH L 27.0% C 0.065 H 317.2°. Best body text is #FFFFFF at 15.43:1 contrast (WCAG AA passes).

Color values

HEX	#331B3B
RGB	rgb(51, 27, 59)
HSL	hsl(285, 37%, 17%)
HSV	hsv(285, 54%, 23%)
CMYK	cmyk(13.6%, 54.2%, 0%, 76.9%)
CIE-LAB	lab(14.42, 18.49, -15.93)
CIE-LCH	lch(14.42, 24.41, 319.26°)
OKLab	oklab(26.99% 0.0477 -0.0441)
OKLCH	oklch(26.99% 0.065 317.2)
XYZ	xyz(2.5465, 1.8035, 4.3508)
Luminance	0.0180 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B3B #233B1B

analogous

#231B3B #331B3B #3B1B33

triadic

#331B3B #3B331B #1B3B33

tetradic

#331B3B #3B231B #233B1B #1B333B

square

#331B3B #3B231B #233B1B #1B333B

split-complementary

#331B3B #333B1B #1B3B23

monochromatic

#120A15 #120A15 #331B3B #572E65 #7C418F

Accessibility & contrast

On white

15.43

#331B3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#331B3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B3B

15.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B3B	#FFFFFF	#000000	##FFFFFF
##331B3B	1.00	15.43	1.36	15.43
#FFFFFF	15.43	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15233C

Deuteranopia (green-blind)

#1C253A

Tritanopia (blue-blind)

#331F28

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #331b3b;
/* rgb */ color: rgb(51, 27, 59);
/* oklch */ color: oklch(27.0% 0.065 317.2);

Tailwind

colors: {
  custom: {
    50: '#6b5871',
    500: '#331b3b',
    950: '#000000',
  },
}

SCSS

$custom: #331b3b;
$custom-light: #6b5871;
$custom-dark: #000000;

JSON

{
  "hex": "#331b3b",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 59
  },
  "hsl": {
    "h": 285,
    "s": 37.209,
    "l": 16.863
  },
  "oklch": {
    "l": 0.26986,
    "c": 0.06496,
    "h": 317.2
  },
  "luminance": 0.01803
}

Semantic roles & 50–950 ramp

primary

#331B3B

secondary

#4D7042

accent

#CD5B77

background

#F6F5F6

surface

#EBE9EC

border

#C6C5C7

text

#070307

muted

#7A787A

Preview Lab

Preview with #331B3B

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

Preview Lab → · Contrast checker → · Palette generator →