#63181C#63181C

#63181C is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.7% C 0.107 H 22.3°. Best body text is #FFFFFF at 12.51:1 contrast (WCAG AA passes).

Color values

HEX	#63181C
RGB	rgb(99, 24, 28)
HSL	hsl(357, 61%, 24%)
HSV	hsv(357, 76%, 39%)
CMYK	cmyk(0%, 75.8%, 71.7%, 61.2%)
CIE-LAB	lab(21.54, 33.68, 17.29)
CIE-LCH	lch(21.54, 37.86, 27.17°)
OKLab	oklab(33.67% 0.099 0.0405)
OKLCH	oklch(33.67% 0.107 22.3)
XYZ	xyz(5.6824, 3.3906, 1.4536)
Luminance	0.0339 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63181C #18635F

analogous

#631842 #63181C #633A18

triadic

#63181C #1C6318 #181C63

tetradic

#63181C #426318 #18635F #3A1863

square

#63181C #426318 #18635F #3A1863

split-complementary

#63181C #18633A #184263

monochromatic

#190607 #320C0E #63181C #94242A #C63038

Accessibility & contrast

On white

12.51

#63181C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#63181C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #63181C

12.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63181C	#FFFFFF	#000000	##FFFFFF
##63181C	1.00	12.51	1.68	12.51
#FFFFFF	12.51	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D291C

Deuteranopia (green-blind)

#403A1A

Tritanopia (blue-blind)

#6D011A

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #63181c;
/* rgb */ color: rgb(99, 24, 28);
/* oklch */ color: oklch(33.7% 0.107 22.3);

Tailwind

colors: {
  custom: {
    50: '#955b58',
    500: '#63181c',
    950: '#000000',
  },
}

SCSS

$custom: #63181c;
$custom-light: #955b58;
$custom-dark: #000000;

JSON

{
  "hex": "#63181c",
  "rgb": {
    "r": 99,
    "g": 24,
    "b": 28
  },
  "hsl": {
    "h": 356.8,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.3367,
    "c": 0.107,
    "h": 22.3
  },
  "luminance": 0.0339
}

Semantic roles & 50–950 ramp

primary

#63181C

secondary

#3E9994

accent

#E4DC44

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #63181C

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

Preview Lab → · Contrast checker → · Palette generator →