#63181D#63181D

#63181D is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.7% C 0.107 H 21.5°. Best body text is #FFFFFF at 12.51:1 contrast (WCAG AA passes).

Color values

HEX	#63181D
RGB	rgb(99, 24, 29)
HSL	hsl(356, 61%, 24%)
HSV	hsv(356, 76%, 39%)
CMYK	cmyk(0%, 75.8%, 70.7%, 61.2%)
CIE-LAB	lab(21.56, 33.74, 16.63)
CIE-LCH	lch(21.56, 37.62, 26.24°)
OKLab	oklab(33.69% 0.0995 0.0392)
OKLCH	oklch(33.69% 0.107 21.5)
XYZ	xyz(5.6946, 3.3955, 1.5177)
Luminance	0.0340 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63181D #18635E

analogous

#631843 #63181D #633918

triadic

#63181D #1D6318 #181D63

tetradic

#63181D #436318 #18635E #391863

square

#63181D #436318 #18635E #391863

split-complementary

#63181D #186339 #184363

monochromatic

#190607 #320C0F #63181D #94242B #C6303A

Accessibility & contrast

On white

12.51

#63181D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#63181D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #63181D

12.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63181D	#FFFFFF	#000000	##FFFFFF
##63181D	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)

#2D2A1D

Deuteranopia (green-blind)

#403A1B

Tritanopia (blue-blind)

#6D021A

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #63181d;
/* rgb */ color: rgb(99, 24, 29);
/* oklch */ color: oklch(33.7% 0.107 21.5);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#63181d",
  "rgb": {
    "r": 99,
    "g": 24,
    "b": 29
  },
  "hsl": {
    "h": 356,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.33689,
    "c": 0.1069,
    "h": 21.5
  },
  "luminance": 0.03395
}

Semantic roles & 50–950 ramp

primary

#63181D

secondary

#3E9993

accent

#E4D944

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #63181D

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

Preview Lab → · Contrast checker → · Palette generator →