#A63D33#A63D33

#A63D33 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.5% C 0.141 H 28.5°. Best body text is #FFFFFF at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#A63D33
RGB	rgb(166, 61, 51)
HSL	hsl(5, 53%, 43%)
HSV	hsv(5, 69%, 65%)
CMYK	cmyk(0%, 63.3%, 69.3%, 34.9%)
CIE-LAB	lab(40.71, 42.65, 28.94)
CIE-LCH	lch(40.71, 51.54, 34.16°)
OKLab	oklab(50.52% 0.1237 0.0671)
OKLCH	oklch(50.52% 0.141 28.5)
XYZ	xyz(17.9940, 11.6860, 4.4394)
Luminance	0.1168 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63D33 #339CA6

analogous

#A63363 #A63D33 #A67633

triadic

#A63D33 #33A63D #3D33A6

tetradic

#A63D33 #63A633 #339CA6 #7633A6

square

#A63D33 #63A633 #339CA6 #7633A6

split-complementary

#A63D33 #33A676 #3363A6

monochromatic

#481B16 #772C25 #A63D33 #C9584E #D7847C

Accessibility & contrast

On white

6.29

#A63D33 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#A63D33 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63D33

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63D33	#FFFFFF	#000000	##FFFFFF
##A63D33	1.00	6.29	3.34	6.29
#FFFFFF	6.29	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595231

Deuteranopia (green-blind)

#736830

Tritanopia (blue-blind)

#B6253B

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63d33;
/* rgb */ color: rgb(166, 61, 51);
/* oklch */ color: oklch(50.5% 0.141 28.5);

Tailwind

colors: {
  custom: {
    50: '#c7776b',
    500: '#a63d33',
    950: '#000000',
  },
}

SCSS

$custom: #a63d33;
$custom-light: #c7776b;
$custom-dark: #000000;

JSON

{
  "hex": "#a63d33",
  "rgb": {
    "r": 166,
    "g": 61,
    "b": 51
  },
  "hsl": {
    "h": 5.217,
    "s": 52.995,
    "l": 42.549
  },
  "oklch": {
    "l": 0.50521,
    "c": 0.14067,
    "h": 28.5
  },
  "luminance": 0.11683
}

Semantic roles & 50–950 ramp

primary

#A63D33

secondary

#75B9C0

accent

#D0DC4B

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63D33

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

Preview Lab → · Contrast checker → · Palette generator →