#A43521#A43521

#A43521 is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.0% C 0.150 H 32.5°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX#A43521
RGBrgb(164, 53, 33)
HSLhsl(9, 66%, 39%)
HSVhsv(9, 80%, 64%)
CMYKcmyk(0%, 67.7%, 79.9%, 35.7%)
CIE-LABlab(38.81, 44.67, 37.01)
CIE-LCHlch(38.81, 58.01, 39.64°)
OKLaboklab(48.96% 0.1265 0.0806)
OKLCHoklch(48.96% 0.15 32.5)
XYZxyz(16.8594, 10.5510, 2.5874)
Luminance0.1055 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#A43521 #2190A4
analogous
#A4214E #A43521 #A47621
triadic
#A43521 #21A435 #3521A4
tetradic
#A43521 #4EA421 #2190A4 #7621A4
square
#A43521 #4EA421 #2190A4 #7621A4
split-complementary
#A43521 #21A476 #214EA4
monochromatic
#3E140C #712517 #A43521 #D5472D #DF7460

Accessibility & contrast

On white

6.75
#A43521 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.11
#A43521 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A43521
6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##A43521#FFFFFF#000000##FFFFFF
##A435211.006.753.116.75
#FFFFFF6.751.0021.001.00
#0000003.1121.001.0021.00
##FFFFFF6.751.0021.001.00

Color blindness preview

Protanopia (red-blind)
#554C1E
Deuteranopia (green-blind)
#70641C
Tritanopia (blue-blind)
#B51231
Achromatopsia (no color)
#5B5B5B

Design tokens & code

CSS
--color: #a43521;
/* rgb */ color: rgb(164, 53, 33);
/* oklch */ color: oklch(49.0% 0.150 32.5);
Tailwind
colors: {
  custom: {
    50: '#c7725e',
    500: '#a43521',
    950: '#000000',
  },
}
SCSS
$custom: #a43521;
$custom-light: #c7725e;
$custom-dark: #000000;
JSON
{
  "hex": "#a43521",
  "rgb": {
    "r": 164,
    "g": 53,
    "b": 33
  },
  "hsl": {
    "h": 9.16,
    "s": 66.497,
    "l": 38.627
  },
  "oklch": {
    "l": 0.48957,
    "c": 0.15001,
    "h": 32.5
  },
  "luminance": 0.10549
}

Semantic roles & 50–950 ramp

primary
#A43521
secondary
#5DB4C4
accent
#CFE93E
background
#FDF7F5
surface
#FAEDE9
border
#D3C8C5
text
#150804
muted
#837B79

Preview Lab

Preview with #A43521

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

Preview Lab → · Contrast checker → · Palette generator →

#A43521 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva