#A63131#A63131

#A63131 is a mid, vivid red. Relative luminance 0.105; OKLCH L 49.1% C 0.153 H 24.8°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#A63131
RGB	rgb(166, 49, 49)
HSL	hsl(0, 54%, 42%)
HSV	hsv(0, 70%, 65%)
CMYK	cmyk(0%, 70.5%, 70.5%, 34.9%)
CIE-LAB	lab(38.77, 47.71, 27.83)
CIE-LCH	lch(38.77, 55.23, 30.26°)
OKLab	oklab(49.06% 0.1392 0.0643)
OKLCH	oklch(49.06% 0.153 24.8)
XYZ	xyz(17.3805, 10.5279, 4.0220)
Luminance	0.1052 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63131 #31A6A6

analogous

#A6316C #A63131 #A66C31

triadic

#A63131 #31A631 #3131A6

tetradic

#A63131 #6CA631 #31A6A6 #6C31A6

square

#A63131 #6CA631 #31A6A6 #6C31A6

split-complementary

#A63131 #31A66C #316CA6

monochromatic

#471515 #772323 #A63131 #CA4A4A #D87A7A

Accessibility & contrast

On white

6.76

#A63131 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#A63131 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63131

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63131	#FFFFFF	#000000	##FFFFFF
##A63131	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#524B30

Deuteranopia (green-blind)

#6F652D

Tritanopia (blue-blind)

#B70B32

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #a63131;
/* rgb */ color: rgb(166, 49, 49);
/* oklch */ color: oklch(49.1% 0.153 24.8);

Tailwind

colors: {
  custom: {
    50: '#c87169',
    500: '#a63131',
    950: '#000000',
  },
}

SCSS

$custom: #a63131;
$custom-light: #c87169;
$custom-dark: #000000;

JSON

{
  "hex": "#a63131",
  "rgb": {
    "r": 166,
    "g": 49,
    "b": 49
  },
  "hsl": {
    "h": 0,
    "s": 54.419,
    "l": 42.157
  },
  "oklch": {
    "l": 0.49058,
    "c": 0.15328,
    "h": 24.8
  },
  "luminance": 0.10525
}

Semantic roles & 50–950 ramp

primary

#A63131

secondary

#73C0C0

accent

#DEDE4A

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140806

muted

#837B7A

Preview Lab

Preview with #A63131

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

Preview Lab → · Contrast checker → · Palette generator →