#A63431#A63431

#A63431 is a mid, vivid red. Relative luminance 0.108; OKLCH L 49.4% C 0.150 H 25.8°. Best body text is #FFFFFF at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#A63431
RGB	rgb(166, 52, 49)
HSL	hsl(2, 54%, 42%)
HSV	hsv(2, 70%, 65%)
CMYK	cmyk(0%, 68.7%, 70.5%, 34.9%)
CIE-LAB	lab(39.22, 46.49, 28.36)
CIE-LCH	lch(39.22, 54.45, 31.39°)
OKLab	oklab(49.39% 0.1353 0.0655)
OKLCH	oklch(49.39% 0.15 25.8)
XYZ	xyz(17.5101, 10.7873, 4.0653)
Luminance	0.1079 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63431 #31A3A6

analogous

#A63169 #A63431 #A66E31

triadic

#A63431 #31A634 #3431A6

tetradic

#A63431 #69A631 #31A3A6 #6E31A6

square

#A63431 #69A631 #31A3A6 #6E31A6

split-complementary

#A63431 #31A66E #3169A6

monochromatic

#471615 #772523 #A63431 #CA4E4A #D87C7A

Accessibility & contrast

On white

6.65

#A63431 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#A63431 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63431

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63431	#FFFFFF	#000000	##FFFFFF
##A63431	1.00	6.65	3.16	6.65
#FFFFFF	6.65	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544D30

Deuteranopia (green-blind)

#70652D

Tritanopia (blue-blind)

#B61334

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #a63431;
/* rgb */ color: rgb(166, 52, 49);
/* oklch */ color: oklch(49.4% 0.150 25.8);

Tailwind

colors: {
  custom: {
    50: '#c87269',
    500: '#a63431',
    950: '#000000',
  },
}

SCSS

$custom: #a63431;
$custom-light: #c87269;
$custom-dark: #000000;

JSON

{
  "hex": "#a63431",
  "rgb": {
    "r": 166,
    "g": 52,
    "b": 49
  },
  "hsl": {
    "h": 1.538,
    "s": 54.419,
    "l": 42.157
  },
  "oklch": {
    "l": 0.49391,
    "c": 0.1503,
    "h": 25.8
  },
  "luminance": 0.10785
}

Semantic roles & 50–950 ramp

primary

#A63431

secondary

#73BEC0

accent

#DADE4A

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140806

muted

#837B7A

Preview Lab

Preview with #A63431

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

Preview Lab → · Contrast checker → · Palette generator →