#A64437#A64437

#A64437 is a mid, vivid red. Relative luminance 0.125; OKLCH L 51.5% C 0.132 H 29.9°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).

Color values

HEX#A64437
RGBrgb(166, 68, 55)
HSLhsl(7, 50%, 43%)
HSVhsv(7, 67%, 65%)
CMYKcmyk(0%, 59%, 66.9%, 34.9%)
CIE-LABlab(42.03, 39.55, 28.16)
CIE-LCHlch(42.03, 48.56, 35.45°)
OKLaboklab(51.53% 0.1148 0.066)
OKLCHoklch(51.53% 0.132 29.9)
XYZxyz(18.4844, 12.5195, 5.0568)
Luminance0.1252 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#A64437 #3799A6
analogous
#A63761 #A64437 #A67B37
triadic
#A64437 #37A644 #4437A6
tetradic
#A64437 #61A637 #3799A6 #7B37A6
square
#A64437 #61A637 #3799A6 #7B37A6
split-complementary
#A64437 #37A67B #3761A6
monochromatic
#4A1E19 #783128 #A64437 #C66154 #D68C82

Accessibility & contrast

On white

5.99
#A64437 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.50
#A64437 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A64437
5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##A64437#FFFFFF#000000##FFFFFF
##A644371.005.993.505.99
#FFFFFF5.991.0021.001.00
#0000003.5021.001.0021.00
##FFFFFF5.991.0021.001.00

Color blindness preview

Protanopia (red-blind)
#5E5635
Deuteranopia (green-blind)
#766B35
Tritanopia (blue-blind)
#B63041
Achromatopsia (no color)
#636363

Design tokens & code

CSS
--color: #a64437;
/* rgb */ color: rgb(166, 68, 55);
/* oklch */ color: oklch(51.5% 0.132 29.9);
Tailwind
colors: {
  custom: {
    50: '#c77b6e',
    500: '#a64437',
    950: '#000000',
  },
}
SCSS
$custom: #a64437;
$custom-light: #c77b6e;
$custom-dark: #000000;
JSON
{
  "hex": "#a64437",
  "rgb": {
    "r": 166,
    "g": 68,
    "b": 55
  },
  "hsl": {
    "h": 7.027,
    "s": 50.226,
    "l": 43.333
  },
  "oklch": {
    "l": 0.51533,
    "c": 0.13237,
    "h": 29.9
  },
  "luminance": 0.12517
}

Semantic roles & 50–950 ramp

primary
#A64437
secondary
#7AB7BF
accent
#C9DA4E
background
#FDF7F6
surface
#FAEEEC
border
#D3C9C7
text
#140A07
muted
#837C7A

Preview Lab

Preview with #A64437

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

Preview Lab → · Contrast checker → · Palette generator →

#A64437 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva