#631728#631728

#631728 is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.8% C 0.108 H 12.2°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#631728
RGB	rgb(99, 23, 40)
HSL	hsl(347, 62%, 24%)
HSV	hsv(347, 77%, 39%)
CMYK	cmyk(0%, 76.8%, 59.6%, 61.2%)
CIE-LAB	lab(21.65, 34.96, 9.15)
CIE-LCH	lch(21.65, 36.14, 14.67°)
OKLab	oklab(33.83% 0.1056 0.0229)
OKLCH	oklch(33.83% 0.108 12.2)
XYZ	xyz(5.8355, 3.4195, 2.3598)
Luminance	0.0342 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631728 #176352

analogous

#63174E #631728 #632C17

triadic

#631728 #286317 #172863

tetradic

#631728 #4E6317 #176352 #2C1763

square

#631728 #4E6317 #176352 #2C1763

split-complementary

#631728 #17632C #174E63

monochromatic

#19060A #310B14 #631728 #95233C #C62E50

Accessibility & contrast

On white

12.47

#631728 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#631728 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631728

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631728	#FFFFFF	#000000	##FFFFFF
##631728	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B2A28

Deuteranopia (green-blind)

#3E3A26

Tritanopia (blue-blind)

#6D041E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #631728;
/* rgb */ color: rgb(99, 23, 40);
/* oklch */ color: oklch(33.8% 0.108 12.2);

Tailwind

colors: {
  custom: {
    50: '#945b61',
    500: '#631728',
    950: '#000000',
  },
}

SCSS

$custom: #631728;
$custom-light: #945b61;
$custom-dark: #000000;

JSON

{
  "hex": "#631728",
  "rgb": {
    "r": 99,
    "g": 23,
    "b": 40
  },
  "hsl": {
    "h": 346.579,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.33831,
    "c": 0.10808,
    "h": 12.2
  },
  "luminance": 0.03419
}

Semantic roles & 50–950 ramp

primary

#631728

secondary

#3C9A85

accent

#E5C142

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0405

muted

#7E7979

Preview Lab

Preview with #631728

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

Preview Lab → · Contrast checker → · Palette generator →