#631B11#631B11

#631B11 is a dark, moderate red. Relative luminance 0.035; OKLCH L 33.9% C 0.106 H 31.0°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#631B11
RGB	rgb(99, 27, 17)
HSL	hsl(7, 71%, 23%)
HSV	hsv(7, 83%, 39%)
CMYK	cmyk(0%, 72.7%, 82.8%, 61.2%)
CIE-LAB	lab(21.86, 31.81, 24.76)
CIE-LCH	lch(21.86, 40.31, 37.90°)
OKLab	oklab(33.86% 0.0906 0.0543)
OKLCH	oklch(33.86% 0.106 31)
XYZ	xyz(5.6393, 3.4778, 0.9046)
Luminance	0.0348 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631B11 #115963

analogous

#631130 #631B11 #634411

triadic

#631B11 #11631B #1B1163

tetradic

#631B11 #306311 #115963 #441163

square

#631B11 #306311 #115963 #441163

split-complementary

#631B11 #116344 #113063

monochromatic

#1A0704 #2F0D08 #631B11 #97291A #CB3723

Accessibility & contrast

On white

12.39

#631B11 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#631B11 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631B11

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631B11	#FFFFFF	#000000	##FFFFFF
##631B11	1.00	12.39	1.70	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302A0F

Deuteranopia (green-blind)

#423A0E

Tritanopia (blue-blind)

#6E0419

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #631b11;
/* rgb */ color: rgb(99, 27, 17);
/* oklch */ color: oklch(33.9% 0.106 31.0);

Tailwind

colors: {
  custom: {
    50: '#965c4f',
    500: '#631b11',
    950: '#000000',
  },
}

SCSS

$custom: #631b11;
$custom-light: #965c4f;
$custom-dark: #000000;

JSON

{
  "hex": "#631b11",
  "rgb": {
    "r": 99,
    "g": 27,
    "b": 17
  },
  "hsl": {
    "h": 7.317,
    "s": 70.69,
    "l": 22.745
  },
  "oklch": {
    "l": 0.33858,
    "c": 0.10561,
    "h": 31
  },
  "luminance": 0.03477
}

Semantic roles & 50–950 ramp

primary

#631B11

secondary

#348F9B

accent

#D8ED3A

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0F0402

muted

#7E7978

Preview Lab

Preview with #631B11

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

Preview Lab → · Contrast checker → · Palette generator →