#63171B#63171B

#63171B is a dark, moderate red. Relative luminance 0.033; OKLCH L 33.5% C 0.108 H 22.5°. Best body text is #FFFFFF at 12.58:1 contrast (WCAG AA passes).

Color values

HEX	#63171B
RGB	rgb(99, 23, 27)
HSL	hsl(357, 62%, 24%)
HSV	hsv(357, 77%, 39%)
CMYK	cmyk(0%, 76.8%, 72.7%, 61.2%)
CIE-LAB	lab(21.38, 34.03, 17.76)
CIE-LCH	lch(21.38, 38.39, 27.56°)
OKLab	oklab(33.54% 0.0999 0.0414)
OKLCH	oklch(33.54% 0.108 22.5)
XYZ	xyz(5.6504, 3.3454, 1.3849)
Luminance	0.0335 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63171B #17635F

analogous

#631741 #63171B #633917

triadic

#63171B #1B6317 #171B63

tetradic

#63171B #416317 #17635F #391763

square

#63171B #416317 #17635F #391763

split-complementary

#63171B #176339 #174163

monochromatic

#190607 #310B0D #63171B #952329 #C62E36

Accessibility & contrast

On white

12.58

#63171B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#63171B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #63171B

12.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63171B	#FFFFFF	#000000	##FFFFFF
##63171B	1.00	12.58	1.67	12.58
#FFFFFF	12.58	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D291A

Deuteranopia (green-blind)

#403919

Tritanopia (blue-blind)

#6D0019

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #63171b;
/* rgb */ color: rgb(99, 23, 27);
/* oklch */ color: oklch(33.5% 0.108 22.5);

Tailwind

colors: {
  custom: {
    50: '#965a57',
    500: '#63171b',
    950: '#000000',
  },
}

SCSS

$custom: #63171b;
$custom-light: #965a57;
$custom-dark: #000000;

JSON

{
  "hex": "#63171b",
  "rgb": {
    "r": 99,
    "g": 23,
    "b": 27
  },
  "hsl": {
    "h": 356.842,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.33539,
    "c": 0.10816,
    "h": 22.5
  },
  "luminance": 0.03345
}

Semantic roles & 50–950 ramp

primary

#63171B

secondary

#3C9A95

accent

#E5DD42

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #63171B

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

Preview Lab → · Contrast checker → · Palette generator →