#A63A21#A63A21

#A63A21 is a mid, vivid red. Relative luminance 0.112; OKLCH L 49.9% C 0.147 H 34.4°. Best body text is #FFFFFF at 6.46:1 contrast (WCAG AA passes).

Color values

HEX#A63A21
RGBrgb(166, 58, 33)
HSLhsl(11, 67%, 39%)
HSVhsv(11, 80%, 65%)
CMYKcmyk(0%, 65.1%, 80.1%, 34.9%)
CIE-LABlab(39.99, 43.19, 38.31)
CIE-LCHlch(39.99, 57.73, 41.57°)
OKLaboklab(49.91% 0.1217 0.0833)
OKLCHoklch(49.91% 0.147 34.4)
XYZxyz(17.5154, 11.2454, 2.6868)
Luminance0.1124 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#A63A21 #218DA6
analogous
#A6214B #A63A21 #A67D21
triadic
#A63A21 #21A63A #3A21A6
tetradic
#A63A21 #4BA621 #218DA6 #7D21A6
square
#A63A21 #4BA621 #218DA6 #7D21A6
split-complementary
#A63A21 #21A67D #214BA6
monochromatic
#40160D #732817 #A63A21 #D64E2F #E07962

Accessibility & contrast

On white

6.46
#A63A21 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.25
#A63A21 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63A21
6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##A63A21#FFFFFF#000000##FFFFFF
##A63A211.006.463.256.46
#FFFFFF6.461.0021.001.00
#0000003.2521.001.0021.00
##FFFFFF6.461.0021.001.00

Color blindness preview

Protanopia (red-blind)
#594F1D
Deuteranopia (green-blind)
#73671D
Tritanopia (blue-blind)
#B71C35
Achromatopsia (no color)
#5E5E5E

Design tokens & code

CSS
--color: #a63a21;
/* rgb */ color: rgb(166, 58, 33);
/* oklch */ color: oklch(49.9% 0.147 34.4);
Tailwind
colors: {
  custom: {
    50: '#c8755e',
    500: '#a63a21',
    950: '#000000',
  },
}
SCSS
$custom: #a63a21;
$custom-light: #c8755e;
$custom-dark: #000000;
JSON
{
  "hex": "#a63a21",
  "rgb": {
    "r": 166,
    "g": 58,
    "b": 33
  },
  "hsl": {
    "h": 11.278,
    "s": 66.834,
    "l": 39.02
  },
  "oklch": {
    "l": 0.4991,
    "c": 0.14748,
    "h": 34.4
  },
  "luminance": 0.11243
}

Semantic roles & 50–950 ramp

primary
#A63A21
secondary
#5EB1C5
accent
#C9EA3E
background
#FDF7F5
surface
#FAEDE9
border
#D3C8C5
text
#150904
muted
#837B79

Preview Lab

Preview with #A63A21

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

Preview Lab → · Contrast checker → · Palette generator →

#A63A21 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva