#A63531#A63531

#A63531 is a mid, vivid red. Relative luminance 0.109; OKLCH L 49.5% C 0.149 H 26.2°. Best body text is #FFFFFF at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#A63531
RGB	rgb(166, 53, 49)
HSL	hsl(2, 54%, 42%)
HSV	hsv(2, 70%, 65%)
CMYK	cmyk(0%, 68.1%, 70.5%, 34.9%)
CIE-LAB	lab(39.37, 46.07, 28.54)
CIE-LCH	lch(39.37, 54.19, 31.78°)
OKLab	oklab(49.51% 0.134 0.0659)
OKLCH	oklch(49.51% 0.149 26.2)
XYZ	xyz(17.5552, 10.8775, 4.0803)
Luminance	0.1087 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63531 #31A2A6

analogous

#A63168 #A63531 #A66F31

triadic

#A63531 #31A635 #3531A6

tetradic

#A63531 #68A631 #31A2A6 #6F31A6

square

#A63531 #68A631 #31A2A6 #6F31A6

split-complementary

#A63531 #31A66F #3168A6

monochromatic

#471715 #772623 #A63531 #CA4F4A #D87D7A

Accessibility & contrast

On white

6.61

#A63531 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#A63531 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63531

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63531	#FFFFFF	#000000	##FFFFFF
##A63531	1.00	6.61	3.18	6.61
#FFFFFF	6.61	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#544D30

Deuteranopia (green-blind)

#71662E

Tritanopia (blue-blind)

#B61635

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a63531;
/* rgb */ color: rgb(166, 53, 49);
/* oklch */ color: oklch(49.5% 0.149 26.2);

Tailwind

colors: {
  custom: {
    50: '#c87369',
    500: '#a63531',
    950: '#000000',
  },
}

SCSS

$custom: #a63531;
$custom-light: #c87369;
$custom-dark: #000000;

JSON

{
  "hex": "#a63531",
  "rgb": {
    "r": 166,
    "g": 53,
    "b": 49
  },
  "hsl": {
    "h": 2.051,
    "s": 54.419,
    "l": 42.157
  },
  "oklch": {
    "l": 0.49506,
    "c": 0.14929,
    "h": 26.2
  },
  "luminance": 0.10875
}

Semantic roles & 50–950 ramp

primary

#A63531

secondary

#73BDC0

accent

#D9DE4A

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140806

muted

#837B7A

Preview Lab

Preview with #A63531

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

Preview Lab → · Contrast checker → · Palette generator →