#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
RGBrgb(166, 51, 51)
HSLhsl(0, 53%, 43%)
HSVhsv(0, 69%, 65%)
CMYKcmyk(0%, 69.3%, 69.3%, 34.9%)
CIE-LABlab(39.10, 47.00, 27.01)
CIE-LCHlch(39.10, 54.21, 29.88°)
OKLaboklab(49.31% 0.1374 0.0628)
OKLCHoklch(49.31% 0.151 24.6)
XYZxyz(17.5091, 10.7162, 4.2778)
Luminance0.1071 (WCAG relative)
Temperaturewarm
Familyred

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
##A633331.006.683.146.68
#FFFFFF6.681.0021.001.00
#0000003.1421.001.0021.00
##FFFFFF6.681.0021.001.00

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 →

#A63333 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva