#A63333#A63333

#A63333 is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.3% C 0.151 H 24.6°. Best body text is #FFFFFF at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#A63333
RGB	rgb(166, 51, 51)
HSL	hsl(0, 53%, 43%)
HSV	hsv(0, 69%, 65%)
CMYK	cmyk(0%, 69.3%, 69.3%, 34.9%)
CIE-LAB	lab(39.10, 47.00, 27.01)
CIE-LCH	lch(39.10, 54.21, 29.88°)
OKLab	oklab(49.31% 0.1374 0.0628)
OKLCH	oklch(49.31% 0.151 24.6)
XYZ	xyz(17.5091, 10.7162, 4.2778)
Luminance	0.1071 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63333 #33A6A6

analogous

#A6336C #A63333 #A66C33

triadic

#A63333 #33A633 #3333A6

tetradic

#A63333 #6CA633 #33A6A6 #6C33A6

square

#A63333 #6CA633 #33A6A6 #6C33A6

split-complementary

#A63333 #33A66C #336CA6

monochromatic

#481616 #772525 #A63333 #C94E4E #D77C7C

Accessibility & contrast

On white

6.68

#A63333 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#A63333 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63333

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63333	#FFFFFF	#000000	##FFFFFF
##A63333	1.00	6.68	3.14	6.68
#FFFFFF	6.68	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#534C32

Deuteranopia (green-blind)

#706530

Tritanopia (blue-blind)

#B61134

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #a63333;
/* rgb */ color: rgb(166, 51, 51);
/* oklch */ color: oklch(49.3% 0.151 24.6);

Tailwind

colors: {
  custom: {
    50: '#c8726b',
    500: '#a63333',
    950: '#000000',
  },
}

SCSS

$custom: #a63333;
$custom-light: #c8726b;
$custom-dark: #000000;

JSON

{
  "hex": "#a63333",
  "rgb": {
    "r": 166,
    "g": 51,
    "b": 51
  },
  "hsl": {
    "h": 0,
    "s": 52.995,
    "l": 42.549
  },
  "oklch": {
    "l": 0.4931,
    "c": 0.15104,
    "h": 24.6
  },
  "luminance": 0.10714
}

Semantic roles & 50–950 ramp

primary

#A63333

secondary

#75C0C0

accent

#DCDC4B

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140806

muted

#837B7A

Preview Lab

Preview with #A63333

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

Preview Lab → · Contrast checker → · Palette generator →