#631818#631818

#631818 is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.6% C 0.107 H 25.1°. Best body text is #FFFFFF at 12.54:1 contrast (WCAG AA passes).

Color values

HEX	#631818
RGB	rgb(99, 24, 24)
HSL	hsl(0, 61%, 24%)
HSV	hsv(0, 76%, 39%)
CMYK	cmyk(0%, 75.8%, 75.8%, 61.2%)
CIE-LAB	lab(21.48, 33.45, 19.89)
CIE-LCH	lch(21.48, 38.92, 30.73°)
OKLab	oklab(33.6% 0.0973 0.0456)
OKLCH	oklch(33.6% 0.107 25.1)
XYZ	xyz(5.6377, 3.3727, 1.2181)
Luminance	0.0337 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631818 #186363

analogous

#63183E #631818 #633E18

triadic

#631818 #186318 #181863

tetradic

#631818 #3E6318 #186363 #3E1863

square

#631818 #3E6318 #186363 #3E1863

split-complementary

#631818 #18633E #183E63

monochromatic

#190606 #320C0C #631818 #942424 #C63030

Accessibility & contrast

On white

12.54

#631818 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#631818 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631818

12.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631818	#FFFFFF	#000000	##FFFFFF
##631818	1.00	12.54	1.67	12.54
#FFFFFF	12.54	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D2917

Deuteranopia (green-blind)

#403916

Tritanopia (blue-blind)

#6D0019

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #631818;
/* rgb */ color: rgb(99, 24, 24);
/* oklch */ color: oklch(33.6% 0.107 25.1);

Tailwind

colors: {
  custom: {
    50: '#965b55',
    500: '#631818',
    950: '#000000',
  },
}

SCSS

$custom: #631818;
$custom-light: #965b55;
$custom-dark: #000000;

JSON

{
  "hex": "#631818",
  "rgb": {
    "r": 99,
    "g": 24,
    "b": 24
  },
  "hsl": {
    "h": 0,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.33599,
    "c": 0.10747,
    "h": 25.1
  },
  "luminance": 0.03372
}

Semantic roles & 50–950 ramp

primary

#631818

secondary

#3E9999

accent

#E4E444

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0E0403

muted

#7E7978

Preview Lab

Preview with #631818

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

Preview Lab → · Contrast checker → · Palette generator →