#63151B#63151B

#63151B is a dark, moderate red. Relative luminance 0.033; OKLCH L 33.3% C 0.110 H 21.6°. Best body text is #FFFFFF at 12.70:1 contrast (WCAG AA passes).

Color values

HEX	#63151B
RGB	rgb(99, 21, 27)
HSL	hsl(355, 65%, 24%)
HSV	hsv(355, 79%, 39%)
CMYK	cmyk(0%, 78.8%, 72.7%, 61.2%)
CIE-LAB	lab(21.09, 34.83, 17.41)
CIE-LCH	lch(21.09, 38.94, 26.56°)
OKLab	oklab(33.33% 0.1024 0.0406)
OKLCH	oklch(33.33% 0.11 21.6)
XYZ	xyz(5.6122, 3.2690, 1.3722)
Luminance	0.0327 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63151B #15635D

analogous

#631542 #63151B #633615

triadic

#63151B #1B6315 #151B63

tetradic

#63151B #426315 #15635D #361563

square

#63151B #426315 #15635D #361563

split-complementary

#63151B #156336 #154263

monochromatic

#190507 #310A0D #63151B #952029 #C82A37

Accessibility & contrast

On white

12.70

#63151B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#63151B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #63151B

12.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63151B	#FFFFFF	#000000	##FFFFFF
##63151B	1.00	12.70	1.65	12.70
#FFFFFF	12.70	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B281B

Deuteranopia (green-blind)

#3F3919

Tritanopia (blue-blind)

#6D0018

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #63151b;
/* rgb */ color: rgb(99, 21, 27);
/* oklch */ color: oklch(33.3% 0.110 21.6);

Tailwind

colors: {
  custom: {
    50: '#965a57',
    500: '#63151b',
    950: '#000000',
  },
}

SCSS

$custom: #63151b;
$custom-light: #965a57;
$custom-dark: #000000;

JSON

{
  "hex": "#63151b",
  "rgb": {
    "r": 99,
    "g": 21,
    "b": 27
  },
  "hsl": {
    "h": 355.385,
    "s": 65,
    "l": 23.529
  },
  "oklch": {
    "l": 0.33326,
    "c": 0.11021,
    "h": 21.6
  },
  "luminance": 0.03268
}

Semantic roles & 50–950 ramp

primary

#63151B

secondary

#3A9A93

accent

#E8DB40

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #63151B

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

Preview Lab → · Contrast checker → · Palette generator →