#A63A33#A63A33

#A63A33 is a mid, vivid red. Relative luminance 0.114; OKLCH L 50.1% C 0.144 H 27.2°. Best body text is #FFFFFF at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#A63A33
RGB	rgb(166, 58, 51)
HSL	hsl(4, 53%, 43%)
HSV	hsv(4, 69%, 65%)
CMYK	cmyk(0%, 65.1%, 69.3%, 34.9%)
CIE-LAB	lab(40.20, 44.01, 28.34)
CIE-LCH	lch(40.20, 52.34, 32.78°)
OKLab	oklab(50.14% 0.1279 0.0657)
OKLCH	oklch(50.14% 0.144 27.2)
XYZ	xyz(17.8383, 11.3746, 4.3875)
Luminance	0.1137 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63A33 #339FA6

analogous

#A63366 #A63A33 #A67333

triadic

#A63A33 #33A63A #3A33A6

tetradic

#A63A33 #66A633 #339FA6 #7333A6

square

#A63A33 #66A633 #339FA6 #7333A6

split-complementary

#A63A33 #33A673 #3366A6

monochromatic

#481916 #772A25 #A63A33 #C9554E #D7827C

Accessibility & contrast

On white

6.41

#A63A33 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#A63A33 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63A33

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63A33	#FFFFFF	#000000	##FFFFFF
##A63A33	1.00	6.41	3.27	6.41
#FFFFFF	6.41	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575032

Deuteranopia (green-blind)

#726730

Tritanopia (blue-blind)

#B62039

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63a33;
/* rgb */ color: rgb(166, 58, 51);
/* oklch */ color: oklch(50.1% 0.144 27.2);

Tailwind

colors: {
  custom: {
    50: '#c7766b',
    500: '#a63a33',
    950: '#000000',
  },
}

SCSS

$custom: #a63a33;
$custom-light: #c7766b;
$custom-dark: #000000;

JSON

{
  "hex": "#a63a33",
  "rgb": {
    "r": 166,
    "g": 58,
    "b": 51
  },
  "hsl": {
    "h": 3.652,
    "s": 52.995,
    "l": 42.549
  },
  "oklch": {
    "l": 0.50139,
    "c": 0.14382,
    "h": 27.2
  },
  "luminance": 0.11372
}

Semantic roles & 50–950 ramp

primary

#A63A33

secondary

#75BBC0

accent

#D4DC4B

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63A33

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

Preview Lab → · Contrast checker → · Palette generator →