#A63B28#A63B28

#A63B28 is a mid, vivid red. Relative luminance 0.114; OKLCH L 50.1% C 0.145 H 32.3°. Best body text is #FFFFFF at 6.41:1 contrast (WCAG AA passes).

Color values

HEX#A63B28
RGBrgb(166, 59, 40)
HSLhsl(9, 61%, 40%)
HSVhsv(9, 76%, 65%)
CMYKcmyk(0%, 64.5%, 75.9%, 34.9%)
CIE-LABlab(40.23, 43.02, 34.75)
CIE-LCHlch(40.23, 55.30, 38.93°)
OKLaboklab(50.11% 0.1226 0.0775)
OKLCHoklch(50.11% 0.145 32.3)
XYZxyz(17.6748, 11.3906, 3.2750)
Luminance0.1139 (WCAG relative)
Temperaturewarm
Familyred

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#A63B28 #2893A6
analogous
#A62854 #A63B28 #A67A28
triadic
#A63B28 #28A63B #3B28A6
tetradic
#A63B28 #54A628 #2893A6 #7A28A6
square
#A63B28 #54A628 #2893A6 #7A28A6
split-complementary
#A63B28 #28A67A #2854A6
monochromatic
#431810 #75291C #A63B28 #D0523B #DC7D6D

Accessibility & contrast

On white

6.41
#A63B28 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.28
#A63B28 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B28
6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##A63B28#FFFFFF#000000##FFFFFF
##A63B281.006.413.286.41
#FFFFFF6.411.0021.001.00
#0000003.2821.001.0021.00
##FFFFFF6.411.0021.001.00

Color blindness preview

Protanopia (red-blind)
#595025
Deuteranopia (green-blind)
#736824
Tritanopia (blue-blind)
#B71F37
Achromatopsia (no color)
#5F5F5F

Design tokens & code

CSS
--color: #a63b28;
/* rgb */ color: rgb(166, 59, 40);
/* oklch */ color: oklch(50.1% 0.145 32.3);
Tailwind
colors: {
  custom: {
    50: '#c87663',
    500: '#a63b28',
    950: '#000000',
  },
}
SCSS
$custom: #a63b28;
$custom-light: #c87663;
$custom-dark: #000000;
JSON
{
  "hex": "#a63b28",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 40
  },
  "hsl": {
    "h": 9.048,
    "s": 61.165,
    "l": 40.392
  },
  "oklch": {
    "l": 0.50114,
    "c": 0.145,
    "h": 32.3
  },
  "luminance": 0.11388
}

Semantic roles & 50–950 ramp

primary
#A63B28
secondary
#67B5C2
accent
#CCE444
background
#FDF7F5
surface
#FAEDEA
border
#D3C8C6
text
#150905
muted
#837B79

Preview Lab

Preview with #A63B28

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

Preview Lab → · Contrast checker → · Palette generator →

#A63B28 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva