#631828#631828

#631828 is a dark, moderate red. Relative luminance 0.035; OKLCH L 33.9% C 0.107 H 12.7°. Best body text is #FFFFFF at 12.41:1 contrast (WCAG AA passes).

Color values

HEX	#631828
RGB	rgb(99, 24, 40)
HSL	hsl(347, 61%, 24%)
HSV	hsv(347, 76%, 39%)
CMYK	cmyk(0%, 75.8%, 59.6%, 61.2%)
CIE-LAB	lab(21.80, 34.55, 9.36)
CIE-LCH	lch(21.80, 35.80, 15.15°)
OKLab	oklab(33.94% 0.1043 0.0234)
OKLCH	oklch(33.94% 0.107 12.7)
XYZ	xyz(5.8558, 3.4599, 2.3666)
Luminance	0.0346 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631828 #186353

analogous

#63184E #631828 #632E18

triadic

#631828 #286318 #182863

tetradic

#631828 #4E6318 #186353 #2E1863

square

#631828 #4E6318 #186353 #2E1863

split-complementary

#631828 #18632E #184E63

monochromatic

#19060A #320C14 #631828 #94243C #C63050

Accessibility & contrast

On white

12.41

#631828 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#631828 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631828

12.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631828	#FFFFFF	#000000	##FFFFFF
##631828	1.00	12.41	1.69	12.41
#FFFFFF	12.41	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B2A28

Deuteranopia (green-blind)

#3E3A26

Tritanopia (blue-blind)

#6D061F

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #631828;
/* rgb */ color: rgb(99, 24, 40);
/* oklch */ color: oklch(33.9% 0.107 12.7);

Tailwind

colors: {
  custom: {
    50: '#945b61',
    500: '#631828',
    950: '#000000',
  },
}

SCSS

$custom: #631828;
$custom-light: #945b61;
$custom-dark: #000000;

JSON

{
  "hex": "#631828",
  "rgb": {
    "r": 99,
    "g": 24,
    "b": 40
  },
  "hsl": {
    "h": 347.2,
    "s": 60.976,
    "l": 24.118
  },
  "oklch": {
    "l": 0.33941,
    "c": 0.10689,
    "h": 12.7
  },
  "luminance": 0.03459
}

Semantic roles & 50–950 ramp

primary

#631828

secondary

#3E9986

accent

#E4C244

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0405

muted

#7E7979

Preview Lab

Preview with #631828

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

Preview Lab → · Contrast checker → · Palette generator →