#331B1B#331B1B

#331B1B is a dark, muted red. Relative luminance 0.016; OKLCH L 25.5% C 0.038 H 20.1°. Best body text is #FFFFFF at 15.99:1 contrast (WCAG AA passes).

Color values

HEX	#331B1B
RGB	rgb(51, 27, 27)
HSL	hsl(0, 31%, 15%)
HSV	hsv(0, 47%, 20%)
CMYK	cmyk(0%, 47.1%, 47.1%, 80%)
CIE-LAB	lab(13.03, 11.88, 5.10)
CIE-LCH	lch(13.03, 12.93, 23.22°)
OKLab	oklab(25.48% 0.0359 0.0131)
OKLCH	oklch(25.48% 0.038 20.1)
XYZ	xyz(1.9551, 1.5670, 1.2362)
Luminance	0.0157 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#331B1B #1B3333

analogous

#331B27 #331B1B #33271B

triadic

#331B1B #1B331B #1B1B33

tetradic

#331B1B #27331B #1B3333 #271B33

square

#331B1B #27331B #1B3333 #271B33

split-complementary

#331B1B #1B3327 #1B2733

monochromatic

#140B0B #140B0B #331B1B #5B3030 #834545

Accessibility & contrast

On white

15.99

#331B1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#331B1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #331B1B

15.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##331B1B	#FFFFFF	#000000	##FFFFFF
##331B1B	1.00	15.99	1.31	15.99
#FFFFFF	15.99	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	15.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#201F1B

Deuteranopia (green-blind)

#26231B

Tritanopia (blue-blind)

#37181B

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #331b1b;
/* rgb */ color: rgb(51, 27, 27);
/* oklch */ color: oklch(25.5% 0.038 20.1);

Tailwind

colors: {
  custom: {
    50: '#6c5757',
    500: '#331b1b',
    950: '#000000',
  },
}

SCSS

$custom: #331b1b;
$custom-light: #6c5757;
$custom-dark: #000000;

JSON

{
  "hex": "#331b1b",
  "rgb": {
    "r": 51,
    "g": 27,
    "b": 27
  },
  "hsl": {
    "h": 0,
    "s": 30.769,
    "l": 15.294
  },
  "oklch": {
    "l": 0.25478,
    "c": 0.03824,
    "h": 20.1
  },
  "luminance": 0.01567
}

Semantic roles & 50–950 ramp

primary

#331B1B

secondary

#436767

accent

#C7C761

background

#F6F5F5

surface

#EBE9E9

border

#C6C5C5

text

#070303

muted

#7A7878

Preview Lab

Preview with #331B1B

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

Preview Lab → · Contrast checker → · Palette generator →