#631918#631918

#631918 is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.7% C 0.106 H 25.6°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#631918
RGB	rgb(99, 25, 24)
HSL	hsl(1, 61%, 24%)
HSV	hsv(1, 76%, 39%)
CMYK	cmyk(0%, 74.7%, 75.8%, 61.2%)
CIE-LAB	lab(21.63, 33.02, 20.07)
CIE-LCH	lch(21.63, 38.64, 31.29°)
OKLab	oklab(33.72% 0.096 0.046)
OKLCH	oklch(33.72% 0.106 25.6)
XYZ	xyz(5.6587, 3.4147, 1.2251)
Luminance	0.0341 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631918 #186263

analogous

#63183D #631918 #633F18

triadic

#631918 #186319 #191863

tetradic

#631918 #3D6318 #186263 #3F1863

square

#631918 #3D6318 #186263 #3F1863

split-complementary

#631918 #18633F #183D63

monochromatic

#190606 #320D0C #631918 #942524 #C63230

Accessibility & contrast

On white

12.48

#631918 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#631918 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631918

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631918	#FFFFFF	#000000	##FFFFFF
##631918	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2A17

Deuteranopia (green-blind)

#413A16

Tritanopia (blue-blind)

#6D021A

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #631918;
/* rgb */ color: rgb(99, 25, 24);
/* oklch */ color: oklch(33.7% 0.106 25.6);

Tailwind

colors: {
  custom: {
    50: '#965b55',
    500: '#631918',
    950: '#000000',
  },
}

SCSS

$custom: #631918;
$custom-light: #965b55;
$custom-dark: #000000;

JSON

{
  "hex": "#631918",
  "rgb": {
    "r": 99,
    "g": 25,
    "b": 24
  },
  "hsl": {
    "h": 0.8,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.33715,
    "c": 0.10643,
    "h": 25.6
  },
  "luminance": 0.03414
}

Semantic roles & 50–950 ramp

primary

#631918

secondary

#3E9899

accent

#E2E444

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #631918

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

Preview Lab → · Contrast checker → · Palette generator →