#A63F31#A63F31

#A63F31 is a mid, vivid red. Relative luminance 0.119; OKLCH L 50.8% C 0.139 H 30.3°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#A63F31
RGB	rgb(166, 63, 49)
HSL	hsl(7, 54%, 42%)
HSV	hsv(7, 70%, 65%)
CMYK	cmyk(0%, 62%, 70.5%, 34.9%)
CIE-LAB	lab(41.03, 41.61, 30.50)
CIE-LCH	lch(41.03, 51.59, 36.24°)
OKLab	oklab(50.76% 0.12 0.0702)
OKLCH	oklch(50.76% 0.139 30.3)
XYZ	xyz(18.0596, 11.8862, 4.2484)
Luminance	0.1188 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63F31 #3198A6

analogous

#A6315E #A63F31 #A67931

triadic

#A63F31 #31A63F #3F31A6

tetradic

#A63F31 #5EA631 #3198A6 #7931A6

square

#A63F31 #5EA631 #3198A6 #7931A6

split-complementary

#A63F31 #31A679 #315EA6

monochromatic

#471B15 #772D23 #A63F31 #CA5A4A #D8857A

Accessibility & contrast

On white

6.22

#A63F31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#A63F31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63F31

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63F31	#FFFFFF	#000000	##FFFFFF
##A63F31	1.00	6.22	3.38	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B532F

Deuteranopia (green-blind)

#74692E

Tritanopia (blue-blind)

#B6283C

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #a63f31;
/* rgb */ color: rgb(166, 63, 49);
/* oklch */ color: oklch(50.8% 0.139 30.3);

Tailwind

colors: {
  custom: {
    50: '#c77869',
    500: '#a63f31',
    950: '#000000',
  },
}

SCSS

$custom: #a63f31;
$custom-light: #c77869;
$custom-dark: #000000;

JSON

{
  "hex": "#a63f31",
  "rgb": {
    "r": 166,
    "g": 63,
    "b": 49
  },
  "hsl": {
    "h": 7.179,
    "s": 54.419,
    "l": 42.157
  },
  "oklch": {
    "l": 0.50755,
    "c": 0.139,
    "h": 30.3
  },
  "luminance": 0.11884
}

Semantic roles & 50–950 ramp

primary

#A63F31

secondary

#73B7C0

accent

#CCDE4A

background

#FDF7F6

surface

#FAEEEB

border

#D3C9C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63F31

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

Preview Lab → · Contrast checker → · Palette generator →