#A63F27#A63F27

#A63F27 is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.6% C 0.141 H 34.5°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#A63F27
RGB	rgb(166, 63, 39)
HSL	hsl(11, 62%, 40%)
HSV	hsv(11, 77%, 65%)
CMYK	cmyk(0%, 62%, 76.5%, 34.9%)
CIE-LAB	lab(40.91, 41.13, 36.04)
CIE-LCH	lch(40.91, 54.68, 41.23°)
OKLab	oklab(50.63% 0.1165 0.08)
OKLCH	oklch(50.63% 0.141 34.5)
XYZ	xyz(17.8715, 11.8110, 3.2577)
Luminance	0.1181 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63F27 #278EA6

analogous

#A6274E #A63F27 #A67F27

triadic

#A63F27 #27A63F #3F27A6

tetradic

#A63F27 #4EA627 #278EA6 #7F27A6

square

#A63F27 #4EA627 #278EA6 #7F27A6

split-complementary

#A63F27 #27A67F #274EA6

monochromatic

#431910 #742C1B #A63F27 #D1563A #DC816B

Accessibility & contrast

On white

6.25

#A63F27 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#A63F27 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63F27

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63F27	#FFFFFF	#000000	##FFFFFF
##A63F27	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5224

Deuteranopia (green-blind)

#756924

Tritanopia (blue-blind)

#B7263A

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63f27;
/* rgb */ color: rgb(166, 63, 39);
/* oklch */ color: oklch(50.6% 0.141 34.5);

Tailwind

colors: {
  custom: {
    50: '#c87862',
    500: '#a63f27',
    950: '#000000',
  },
}

SCSS

$custom: #a63f27;
$custom-light: #c87862;
$custom-dark: #000000;

JSON

{
  "hex": "#a63f27",
  "rgb": {
    "r": 166,
    "g": 63,
    "b": 39
  },
  "hsl": {
    "h": 11.339,
    "s": 61.951,
    "l": 40.196
  },
  "oklch": {
    "l": 0.50625,
    "c": 0.14133,
    "h": 34.5
  },
  "luminance": 0.11808
}

Semantic roles & 50–950 ramp

primary

#A63F27

secondary

#66B1C3

accent

#C6E543

background

#FDF7F5

surface

#FAEDEA

border

#D3C8C6

text

#140905

muted

#837B79

Preview Lab

Preview with #A63F27

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

Preview Lab → · Contrast checker → · Palette generator →