#631B2D#631B2D

#631B2D is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.4% C 0.104 H 9.5°. Best body text is #FFFFFF at 12.17:1 contrast (WCAG AA passes).

Color values

HEX	#631B2D
RGB	rgb(99, 27, 45)
HSL	hsl(345, 57%, 25%)
HSV	hsv(345, 73%, 39%)
CMYK	cmyk(0%, 72.7%, 54.5%, 61.2%)
CIE-LAB	lab(22.40, 33.71, 6.71)
CIE-LCH	lch(22.40, 34.37, 11.26°)
OKLab	oklab(34.43% 0.1024 0.0172)
OKLCH	oklch(34.43% 0.104 9.5)
XYZ	xyz(6.0117, 3.6268, 2.8656)
Luminance	0.0363 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631B2D #1B6351

analogous

#631B51 #631B2D #632D1B

triadic

#631B2D #2D631B #1B2D63

tetradic

#631B2D #51631B #1B6351 #2D1B63

square

#631B2D #51631B #1B6351 #2D1B63

split-complementary

#631B2D #1B632D #1B5163

monochromatic

#18070B #330E17 #631B2D #932843 #C33559

Accessibility & contrast

On white

12.17

#631B2D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#631B2D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631B2D

12.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631B2D	#FFFFFF	#000000	##FFFFFF
##631B2D	1.00	12.17	1.73	12.17
#FFFFFF	12.17	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C2C2D

Deuteranopia (green-blind)

#3F3B2B

Tritanopia (blue-blind)

#6C0E22

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #631b2d;
/* rgb */ color: rgb(99, 27, 45);
/* oklch */ color: oklch(34.4% 0.104 9.5);

Tailwind

colors: {
  custom: {
    50: '#945d65',
    500: '#631b2d',
    950: '#000000',
  },
}

SCSS

$custom: #631b2d;
$custom-light: #945d65;
$custom-dark: #000000;

JSON

{
  "hex": "#631b2d",
  "rgb": {
    "r": 99,
    "g": 27,
    "b": 45
  },
  "hsl": {
    "h": 345,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34428,
    "c": 0.10379,
    "h": 9.5
  },
  "luminance": 0.03626
}

Semantic roles & 50–950 ramp

primary

#631B2D

secondary

#419883

accent

#E0BA47

background

#F9F5F6

surface

#F2E9EB

border

#CCC5C6

text

#0E0405

muted

#7E797A

Preview Lab

Preview with #631B2D

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

Preview Lab → · Contrast checker → · Palette generator →