#A63D21#A63D21

#A63D21 is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.3% C 0.145 H 35.7°. Best body text is #FFFFFF at 6.34:1 contrast (WCAG AA passes).

Color values

HEX#A63D21
RGBrgb(166, 61, 33)
HSLhsl(13, 67%, 39%)
HSVhsv(13, 80%, 65%)
CMYKcmyk(0%, 63.3%, 80.1%, 34.9%)
CIE-LABlab(40.50, 41.83, 38.82)
CIE-LCHlch(40.50, 57.06, 42.87°)
OKLaboklab(50.3% 0.1175 0.0844)
OKLCHoklch(50.3% 0.145 35.7)
XYZxyz(17.6711, 11.5568, 2.7387)
Luminance0.1155 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#A63D21 #218AA6
analogous
#A62147 #A63D21 #A68021
triadic
#A63D21 #21A63D #3D21A6
tetradic
#A63D21 #47A621 #218AA6 #8021A6
square
#A63D21 #47A621 #218AA6 #8021A6
split-complementary
#A63D21 #21A680 #2147A6
monochromatic
#40170D #732A17 #A63D21 #D6522F #E07C62

Accessibility & contrast

On white

6.34
#A63D21 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.31
#A63D21 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63D21
6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##A63D21#FFFFFF#000000##FFFFFF
##A63D211.006.343.316.34
#FFFFFF6.341.0021.001.00
#0000003.3121.001.0021.00
##FFFFFF6.341.0021.001.00

Color blindness preview

Protanopia (red-blind)
#5B511D
Deuteranopia (green-blind)
#75681D
Tritanopia (blue-blind)
#B72237
Achromatopsia (no color)
#5F5F5F

Design tokens & code

CSS
--color: #a63d21;
/* rgb */ color: rgb(166, 61, 33);
/* oklch */ color: oklch(50.3% 0.145 35.7);
Tailwind
colors: {
  custom: {
    50: '#c8775e',
    500: '#a63d21',
    950: '#000000',
  },
}
SCSS
$custom: #a63d21;
$custom-light: #c8775e;
$custom-dark: #000000;
JSON
{
  "hex": "#a63d21",
  "rgb": {
    "r": 166,
    "g": 61,
    "b": 33
  },
  "hsl": {
    "h": 12.632,
    "s": 66.834,
    "l": 39.02
  },
  "oklch": {
    "l": 0.50296,
    "c": 0.14466,
    "h": 35.7
  },
  "luminance": 0.11554
}

Semantic roles & 50–950 ramp

primary
#A63D21
secondary
#5EAFC5
accent
#C6EA3E
background
#FDF7F5
surface
#FAEDE9
border
#D3C8C5
text
#150904
muted
#837B79

Preview Lab

Preview with #A63D21

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

Preview Lab → · Contrast checker → · Palette generator →

#A63D21 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva