#A63F2B#A63F2B

#A63F2B is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.7% C 0.140 H 32.9°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#A63F2B
RGB	rgb(166, 63, 43)
HSL	hsl(10, 59%, 41%)
HSV	hsv(10, 74%, 65%)
CMYK	cmyk(0%, 62%, 74.1%, 34.9%)
CIE-LAB	lab(40.96, 41.31, 33.86)
CIE-LCH	lch(40.96, 53.41, 39.34°)
OKLab	oklab(50.67% 0.1178 0.0763)
OKLCH	oklch(50.67% 0.14 32.9)
XYZ	xyz(17.9413, 11.8389, 3.6254)
Luminance	0.1184 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63F2B #2B92A6

analogous

#A62B54 #A63F2B #A67C2B

triadic

#A63F2B #2BA63F #3F2BA6

tetradic

#A63F2B #54A62B #2B92A6 #7C2BA6

square

#A63F2B #54A62B #2B92A6 #7C2BA6

split-complementary

#A63F2B #2BA67C #2B54A6

monochromatic

#451A12 #752D1E #A63F2B #CE5741 #DA8271

Accessibility & contrast

On white

6.24

#A63F2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#A63F2B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63F2B

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63F2B	#FFFFFF	#000000	##FFFFFF
##A63F2B	1.00	6.24	3.37	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5228

Deuteranopia (green-blind)

#756928

Tritanopia (blue-blind)

#B6273B

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #a63f2b;
/* rgb */ color: rgb(166, 63, 43);
/* oklch */ color: oklch(50.7% 0.140 32.9);

Tailwind

colors: {
  custom: {
    50: '#c87865',
    500: '#a63f2b',
    950: '#000000',
  },
}

SCSS

$custom: #a63f2b;
$custom-light: #c87865;
$custom-dark: #000000;

JSON

{
  "hex": "#a63f2b",
  "rgb": {
    "r": 166,
    "g": 63,
    "b": 43
  },
  "hsl": {
    "h": 9.756,
    "s": 58.852,
    "l": 40.98
  },
  "oklch": {
    "l": 0.50673,
    "c": 0.14037,
    "h": 32.9
  },
  "luminance": 0.11836
}

Semantic roles & 50–950 ramp

primary

#A63F2B

secondary

#6BB3C1

accent

#C9E246

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63F2B

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

Preview Lab → · Contrast checker → · Palette generator →