#A63A31#A63A31

#A63A31 is a mid, vivid red. Relative luminance 0.114; OKLCH L 50.1% C 0.144 H 28.1°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#A63A31
RGB	rgb(166, 58, 49)
HSL	hsl(5, 54%, 42%)
HSV	hsv(5, 70%, 65%)
CMYK	cmyk(0%, 65.1%, 70.5%, 34.9%)
CIE-LAB	lab(40.18, 43.90, 29.49)
CIE-LCH	lch(40.18, 52.89, 33.89°)
OKLab	oklab(50.11% 0.1272 0.068)
OKLCH	oklch(50.11% 0.144 28.1)
XYZ	xyz(17.7952, 11.3574, 4.1603)
Luminance	0.1135 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63A31 #319DA6

analogous

#A63163 #A63A31 #A67431

triadic

#A63A31 #31A63A #3A31A6

tetradic

#A63A31 #63A631 #319DA6 #7431A6

square

#A63A31 #63A631 #319DA6 #7431A6

split-complementary

#A63A31 #31A674 #3163A6

monochromatic

#471915 #772923 #A63A31 #CA544A #D8817A

Accessibility & contrast

On white

6.42

#A63A31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#A63A31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63A31

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63A31	#FFFFFF	#000000	##FFFFFF
##A63A31	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#57502F

Deuteranopia (green-blind)

#72672E

Tritanopia (blue-blind)

#B61F39

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63a31;
/* rgb */ color: rgb(166, 58, 49);
/* oklch */ color: oklch(50.1% 0.144 28.1);

Tailwind

colors: {
  custom: {
    50: '#c77669',
    500: '#a63a31',
    950: '#000000',
  },
}

SCSS

$custom: #a63a31;
$custom-light: #c77669;
$custom-dark: #000000;

JSON

{
  "hex": "#a63a31",
  "rgb": {
    "r": 166,
    "g": 58,
    "b": 49
  },
  "hsl": {
    "h": 4.615,
    "s": 54.419,
    "l": 42.157
  },
  "oklch": {
    "l": 0.50108,
    "c": 0.14418,
    "h": 28.1
  },
  "luminance": 0.11355
}

Semantic roles & 50–950 ramp

primary

#A63A31

secondary

#73BAC0

accent

#D2DE4A

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63A31

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

Preview Lab → · Contrast checker → · Palette generator →