#63131B#63131B

#63131B is a dark, moderate red. Relative luminance 0.032; OKLCH L 33.1% C 0.112 H 20.8°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#63131B
RGB	rgb(99, 19, 27)
HSL	hsl(354, 68%, 23%)
HSV	hsv(354, 81%, 39%)
CMYK	cmyk(0%, 80.8%, 72.7%, 61.2%)
CIE-LAB	lab(20.82, 35.58, 17.08)
CIE-LCH	lch(20.82, 39.46, 25.64°)
OKLab	oklab(33.13% 0.1048 0.0399)
OKLCH	oklch(33.13% 0.112 20.8)
XYZ	xyz(5.5769, 3.1984, 1.3604)
Luminance	0.0320 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63131B #13635B

analogous

#631343 #63131B #633313

triadic

#63131B #1B6313 #131B63

tetradic

#63131B #436313 #13635B #331363

square

#63131B #436313 #13635B #331363

split-complementary

#63131B #136333 #134363

monochromatic

#1A0507 #30090D #63131B #961D29 #CA2737

Accessibility & contrast

On white

12.81

#63131B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#63131B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #63131B

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63131B	#FFFFFF	#000000	##FFFFFF
##63131B	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A271B

Deuteranopia (green-blind)

#3F3818

Tritanopia (blue-blind)

#6D0017

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #63131b;
/* rgb */ color: rgb(99, 19, 27);
/* oklch */ color: oklch(33.1% 0.112 20.8);

Tailwind

colors: {
  custom: {
    50: '#965957',
    500: '#63131b',
    950: '#000000',
  },
}

SCSS

$custom: #63131b;
$custom-light: #965957;
$custom-dark: #000000;

JSON

{
  "hex": "#63131b",
  "rgb": {
    "r": 99,
    "g": 19,
    "b": 27
  },
  "hsl": {
    "h": 354,
    "s": 67.797,
    "l": 23.137
  },
  "oklch": {
    "l": 0.33126,
    "c": 0.11218,
    "h": 20.8
  },
  "luminance": 0.03198
}

Semantic roles & 50–950 ramp

primary

#63131B

secondary

#379B91

accent

#EBD93D

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #63131B

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

Preview Lab → · Contrast checker → · Palette generator →