#A33831#A33831

#A33831 is a mid, vivid red. Relative luminance 0.108; OKLCH L 49.4% C 0.143 H 27.3°. Best body text is #FFFFFF at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#A33831
RGB	rgb(163, 56, 49)
HSL	hsl(4, 54%, 42%)
HSV	hsv(4, 70%, 64%)
CMYK	cmyk(0%, 65.6%, 69.9%, 36.1%)
CIE-LAB	lab(39.31, 43.73, 28.33)
CIE-LCH	lch(39.31, 52.10, 32.94°)
OKLab	oklab(49.36% 0.127 0.0655)
OKLCH	oklch(49.36% 0.143 27.3)
XYZ	xyz(17.0746, 10.8390, 4.0982)
Luminance	0.1084 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A33831 #319CA3

analogous

#A33163 #A33831 #A37131

triadic

#A33831 #31A338 #3831A3

tetradic

#A33831 #63A331 #319CA3 #7131A3

square

#A33831 #63A331 #319CA3 #7131A3

split-complementary

#A33831 #31A371 #3163A3

monochromatic

#451815 #742823 #A33831 #C85149 #D67E78

Accessibility & contrast

On white

6.63

#A33831 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#A33831 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A33831

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A33831	#FFFFFF	#000000	##FFFFFF
##A33831	1.00	6.63	3.17	6.63
#FFFFFF	6.63	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#554E2F

Deuteranopia (green-blind)

#70652E

Tritanopia (blue-blind)

#B31D37

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #a33831;
/* rgb */ color: rgb(163, 56, 49);
/* oklch */ color: oklch(49.4% 0.143 27.3);

Tailwind

colors: {
  custom: {
    50: '#c57469',
    500: '#a33831',
    950: '#000000',
  },
}

SCSS

$custom: #a33831;
$custom-light: #c57469;
$custom-dark: #000000;

JSON

{
  "hex": "#a33831",
  "rgb": {
    "r": 163,
    "g": 56,
    "b": 49
  },
  "hsl": {
    "h": 3.684,
    "s": 53.774,
    "l": 41.569
  },
  "oklch": {
    "l": 0.49356,
    "c": 0.1429,
    "h": 27.3
  },
  "luminance": 0.10837
}

Semantic roles & 50–950 ramp

primary

#A33831

secondary

#71BABF

accent

#D4DD4B

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A33831

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

Preview Lab → · Contrast checker → · Palette generator →