#63181F#63181F

#63181F is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.7% C 0.107 H 20.0°. Best body text is #FFFFFF at 12.49:1 contrast (WCAG AA passes).

Color values

HEX	#63181F
RGB	rgb(99, 24, 31)
HSL	hsl(354, 61%, 24%)
HSV	hsv(354, 76%, 39%)
CMYK	cmyk(0%, 75.8%, 68.7%, 61.2%)
CIE-LAB	lab(21.60, 33.87, 15.31)
CIE-LCH	lch(21.60, 37.17, 24.33°)
OKLab	oklab(33.73% 0.1003 0.0365)
OKLCH	oklch(33.73% 0.107 20)
XYZ	xyz(5.7201, 3.4057, 1.6522)
Luminance	0.0340 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63181F #18635C

analogous

#631845 #63181F #633718

triadic

#63181F #1F6318 #181F63

tetradic

#63181F #456318 #18635C #371863

square

#63181F #456318 #18635C #371863

split-complementary

#63181F #186337 #184563

monochromatic

#190608 #320C10 #63181F #94242E #C6303E

Accessibility & contrast

On white

12.49

#63181F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#63181F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #63181F

12.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63181F	#FFFFFF	#000000	##FFFFFF
##63181F	1.00	12.49	1.68	12.49
#FFFFFF	12.49	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D2A1F

Deuteranopia (green-blind)

#403A1D

Tritanopia (blue-blind)

#6D021B

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #63181f;
/* rgb */ color: rgb(99, 24, 31);
/* oklch */ color: oklch(33.7% 0.107 20.0);

Tailwind

colors: {
  custom: {
    50: '#955b5a',
    500: '#63181f',
    950: '#000000',
  },
}

SCSS

$custom: #63181f;
$custom-light: #955b5a;
$custom-dark: #000000;

JSON

{
  "hex": "#63181f",
  "rgb": {
    "r": 99,
    "g": 24,
    "b": 31
  },
  "hsl": {
    "h": 354.4,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.33729,
    "c": 0.10676,
    "h": 20
  },
  "luminance": 0.03405
}

Semantic roles & 50–950 ramp

primary

#63181F

secondary

#3E9991

accent

#E4D544

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #63181F

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

Preview Lab → · Contrast checker → · Palette generator →