#AC3721#AC3721

#AC3721 is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.6% C 0.157 H 32.8°. Best body text is #FFFFFF at 6.32:1 contrast (WCAG AA passes).

Color values

HEX#AC3721
RGBrgb(172, 55, 33)
HSLhsl(9, 68%, 40%)
HSVhsv(9, 81%, 67%)
CMYKcmyk(0%, 68%, 80.8%, 32.5%)
CIE-LABlab(40.60, 46.62, 39.27)
CIE-LCHlch(40.60, 60.96, 40.11°)
OKLaboklab(50.57% 0.1318 0.0848)
OKLCHoklch(50.57% 0.157 32.8)
XYZxyz(18.6561, 11.6156, 2.6982)
Luminance0.1161 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#AC3721 #2196AC
analogous
#AC2151 #AC3721 #AC7C21
triadic
#AC3721 #21AC37 #3721AC
tetradic
#AC3721 #51AC21 #2196AC #7C21AC
square
#AC3721 #51AC21 #2196AC #7C21AC
split-complementary
#AC3721 #21AC7C #2151AC
monochromatic
#45160D #792717 #AC3721 #D84D32 #E27966

Accessibility & contrast

On white

6.32
#AC3721 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.32
#AC3721 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3721
6.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##AC3721#FFFFFF#000000##FFFFFF
##AC37211.006.323.326.32
#FFFFFF6.321.0021.001.00
#0000003.3221.001.0021.00
##FFFFFF6.321.0021.001.00

Color blindness preview

Protanopia (red-blind)
#594F1D
Deuteranopia (green-blind)
#76691C
Tritanopia (blue-blind)
#BE1133
Achromatopsia (no color)
#606060

Design tokens & code

CSS
--color: #ac3721;
/* rgb */ color: rgb(172, 55, 33);
/* oklch */ color: oklch(50.6% 0.157 32.8);
Tailwind
colors: {
  custom: {
    50: '#cd745e',
    500: '#ac3721',
    950: '#000000',
  },
}
SCSS
$custom: #ac3721;
$custom-light: #cd745e;
$custom-dark: #000000;
JSON
{
  "hex": "#ac3721",
  "rgb": {
    "r": 172,
    "g": 55,
    "b": 33
  },
  "hsl": {
    "h": 9.496,
    "s": 67.805,
    "l": 40.196
  },
  "oklch": {
    "l": 0.5057,
    "c": 0.1567,
    "h": 32.8
  },
  "luminance": 0.11613
}

Semantic roles & 50–950 ramp

primary
#AC3721
secondary
#62B7C7
accent
#CFEB3D
background
#FDF7F5
surface
#FBEDE9
border
#D4C8C5
text
#150904
muted
#837B79

Preview Lab

Preview with #AC3721

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

Preview Lab → · Contrast checker → · Palette generator →

#AC3721 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva