#631B10#631B10

#631B10 is a dark, moderate red. Relative luminance 0.035; OKLCH L 33.8% C 0.106 H 31.5°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#631B10
RGB	rgb(99, 27, 16)
HSL	hsl(8, 72%, 23%)
HSV	hsv(8, 84%, 39%)
CMYK	cmyk(0%, 72.7%, 83.8%, 61.2%)
CIE-LAB	lab(21.85, 31.77, 25.32)
CIE-LCH	lch(21.85, 40.62, 38.55°)
OKLab	oklab(33.85% 0.0902 0.0553)
OKLCH	oklch(33.85% 0.106 31.5)
XYZ	xyz(5.6317, 3.4748, 0.8643)
Luminance	0.0347 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631B10 #105863

analogous

#63102E #631B10 #634510

triadic

#631B10 #10631B #1B1063

tetradic

#631B10 #2E6310 #105863 #451063

square

#631B10 #2E6310 #105863 #451063

split-complementary

#631B10 #106345 #102E63

monochromatic

#1A0704 #2E0D07 #631B10 #982919 #CC3821

Accessibility & contrast

On white

12.39

#631B10 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#631B10 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631B10

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631B10	#FFFFFF	#000000	##FFFFFF
##631B10	1.00	12.39	1.69	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302A0E

Deuteranopia (green-blind)

#423A0D

Tritanopia (blue-blind)

#6E0419

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #631b10;
/* rgb */ color: rgb(99, 27, 16);
/* oklch */ color: oklch(33.8% 0.106 31.5);

Tailwind

colors: {
  custom: {
    50: '#965c4f',
    500: '#631b10',
    950: '#000000',
  },
}

SCSS

$custom: #631b10;
$custom-light: #965c4f;
$custom-dark: #000000;

JSON

{
  "hex": "#631b10",
  "rgb": {
    "r": 99,
    "g": 27,
    "b": 16
  },
  "hsl": {
    "h": 7.952,
    "s": 72.174,
    "l": 22.549
  },
  "oklch": {
    "l": 0.33846,
    "c": 0.10581,
    "h": 31.5
  },
  "luminance": 0.03474
}

Semantic roles & 50–950 ramp

primary

#631B10

secondary

#338E9C

accent

#D7EF39

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0F0402

muted

#7E7978

Preview Lab

Preview with #631B10

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

Preview Lab → · Contrast checker → · Palette generator →