#631D2B#631D2B

#631D2B is a dark, moderate red. Relative luminance 0.037; OKLCH L 34.6% C 0.101 H 12.3°. Best body text is #FFFFFF at 12.06:1 contrast (WCAG AA passes).

Color values

HEX	#631D2B
RGB	rgb(99, 29, 43)
HSL	hsl(348, 55%, 25%)
HSV	hsv(348, 71%, 39%)
CMYK	cmyk(0%, 70.7%, 56.6%, 61.2%)
CIE-LAB	lab(22.68, 32.61, 8.48)
CIE-LCH	lch(22.68, 33.70, 14.58°)
OKLab	oklab(34.62% 0.0986 0.0214)
OKLCH	oklch(34.62% 0.101 12.3)
XYZ	xyz(6.0215, 3.7066, 2.6834)
Luminance	0.0371 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631D2B #1D6355

analogous

#631D4E #631D2B #63321D

triadic

#631D2B #2B631D #1D2B63

tetradic

#631D2B #4E631D #1D6355 #321D63

square

#631D2B #4E631D #1D6355 #321D63

split-complementary

#631D2B #1D6332 #1D4E63

monochromatic

#18070A #340F16 #631D2B #922B40 #C23954

Accessibility & contrast

On white

12.06

#631D2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#631D2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631D2B

12.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631D2B	#FFFFFF	#000000	##FFFFFF
##631D2B	1.00	12.06	1.74	12.06
#FFFFFF	12.06	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2D2B

Deuteranopia (green-blind)

#403B29

Tritanopia (blue-blind)

#6C1023

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #631d2b;
/* rgb */ color: rgb(99, 29, 43);
/* oklch */ color: oklch(34.6% 0.101 12.3);

Tailwind

colors: {
  custom: {
    50: '#945e64',
    500: '#631d2b',
    950: '#000000',
  },
}

SCSS

$custom: #631d2b;
$custom-light: #945e64;
$custom-dark: #000000;

JSON

{
  "hex": "#631d2b",
  "rgb": {
    "r": 99,
    "g": 29,
    "b": 43
  },
  "hsl": {
    "h": 348,
    "s": 54.688,
    "l": 25.098
  },
  "oklch": {
    "l": 0.34619,
    "c": 0.10088,
    "h": 12.3
  },
  "luminance": 0.03706
}

Semantic roles & 50–950 ramp

primary

#631D2B

secondary

#449887

accent

#DEC04A

background

#F9F5F5

surface

#F2E9EA

border

#CCC5C6

text

#0E0505

muted

#7E7979

Preview Lab

Preview with #631D2B

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

Preview Lab → · Contrast checker → · Palette generator →