#A63D31#A63D31

#A63D31 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.5% C 0.141 H 29.4°. Best body text is #FFFFFF at 6.30:1 contrast (WCAG AA passes).

Color values

HEX	#A63D31
RGB	rgb(166, 61, 49)
HSL	hsl(6, 54%, 42%)
HSV	hsv(6, 70%, 65%)
CMYK	cmyk(0%, 63.3%, 70.5%, 34.9%)
CIE-LAB	lab(40.68, 42.54, 30.09)
CIE-LCH	lch(40.68, 52.11, 35.27°)
OKLab	oklab(50.49% 0.1229 0.0693)
OKLCH	oklch(50.49% 0.141 29.4)
XYZ	xyz(17.9509, 11.6687, 4.2122)
Luminance	0.1167 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63D31 #319AA6

analogous

#A6315F #A63D31 #A67831

triadic

#A63D31 #31A63D #3D31A6

tetradic

#A63D31 #5FA631 #319AA6 #7831A6

square

#A63D31 #5FA631 #319AA6 #7831A6

split-complementary

#A63D31 #31A678 #315FA6

monochromatic

#471A15 #772C23 #A63D31 #CA584A #D8837A

Accessibility & contrast

On white

6.30

#A63D31 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#A63D31 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63D31

6.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63D31	#FFFFFF	#000000	##FFFFFF
##A63D31	1.00	6.30	3.33	6.30
#FFFFFF	6.30	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#59522F

Deuteranopia (green-blind)

#74682E

Tritanopia (blue-blind)

#B6253B

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63d31;
/* rgb */ color: rgb(166, 61, 49);
/* oklch */ color: oklch(50.5% 0.141 29.4);

Tailwind

colors: {
  custom: {
    50: '#c77769',
    500: '#a63d31',
    950: '#000000',
  },
}

SCSS

$custom: #a63d31;
$custom-light: #c77769;
$custom-dark: #000000;

JSON

{
  "hex": "#a63d31",
  "rgb": {
    "r": 166,
    "g": 61,
    "b": 49
  },
  "hsl": {
    "h": 6.154,
    "s": 54.419,
    "l": 42.157
  },
  "oklch": {
    "l": 0.50491,
    "c": 0.14107,
    "h": 29.4
  },
  "luminance": 0.11666
}

Semantic roles & 50–950 ramp

primary

#A63D31

secondary

#73B8C0

accent

#CFDE4A

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140906

muted

#837B7A

Preview Lab

Preview with #A63D31

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

Preview Lab → · Contrast checker → · Palette generator →