#631B2C#631B2C

#631B2C is a dark, moderate red. Relative luminance 0.036; OKLCH L 34.4% C 0.104 H 10.4°. Best body text is #FFFFFF at 12.18:1 contrast (WCAG AA passes).

Color values

HEX	#631B2C
RGB	rgb(99, 27, 44)
HSL	hsl(346, 57%, 25%)
HSV	hsv(346, 73%, 39%)
CMYK	cmyk(0%, 72.7%, 55.6%, 61.2%)
CIE-LAB	lab(22.37, 33.62, 7.37)
CIE-LCH	lch(22.37, 34.41, 12.36°)
OKLab	oklab(34.4% 0.1019 0.0188)
OKLCH	oklch(34.4% 0.104 10.4)
XYZ	xyz(5.9927, 3.6192, 2.7654)
Luminance	0.0362 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631B2C #1B6352

analogous

#631B50 #631B2C #632E1B

triadic

#631B2C #2C631B #1B2C63

tetradic

#631B2C #50631B #1B6352 #2E1B63

square

#631B2C #50631B #1B6352 #2E1B63

split-complementary

#631B2C #1B632E #1B5063

monochromatic

#18070B #330E17 #631B2C #932841 #C33557

Accessibility & contrast

On white

12.18

#631B2C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#631B2C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631B2C

12.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631B2C	#FFFFFF	#000000	##FFFFFF
##631B2C	1.00	12.18	1.72	12.18
#FFFFFF	12.18	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C2C2C

Deuteranopia (green-blind)

#3F3B2A

Tritanopia (blue-blind)

#6C0D22

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #631b2c;
/* rgb */ color: rgb(99, 27, 44);
/* oklch */ color: oklch(34.4% 0.104 10.4);

Tailwind

colors: {
  custom: {
    50: '#945d64',
    500: '#631b2c',
    950: '#000000',
  },
}

SCSS

$custom: #631b2c;
$custom-light: #945d64;
$custom-dark: #000000;

JSON

{
  "hex": "#631b2c",
  "rgb": {
    "r": 99,
    "g": 27,
    "b": 44
  },
  "hsl": {
    "h": 345.833,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34399,
    "c": 0.10363,
    "h": 10.4
  },
  "luminance": 0.03618
}

Semantic roles & 50–950 ramp

primary

#631B2C

secondary

#419884

accent

#E0BC47

background

#F9F5F6

surface

#F2E9EB

border

#CCC5C6

text

#0E0405

muted

#7E797A

Preview Lab

Preview with #631B2C

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

Preview Lab → · Contrast checker → · Palette generator →