#A63F28#A63F28

#A63F28 is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.6% C 0.141 H 34.1°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#A63F28
RGB	rgb(166, 63, 40)
HSL	hsl(11, 61%, 40%)
HSV	hsv(11, 76%, 65%)
CMYK	cmyk(0%, 62%, 75.9%, 34.9%)
CIE-LAB	lab(40.92, 41.17, 35.50)
CIE-LCH	lch(40.92, 54.36, 40.77°)
OKLab	oklab(50.64% 0.1168 0.0791)
OKLCH	oklch(50.64% 0.141 34.1)
XYZ	xyz(17.8883, 11.8177, 3.3462)
Luminance	0.1182 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63F28 #288FA6

analogous

#A62850 #A63F28 #A67E28

triadic

#A63F28 #28A63F #3F28A6

tetradic

#A63F28 #50A628 #288FA6 #7E28A6

square

#A63F28 #50A628 #288FA6 #7E28A6

split-complementary

#A63F28 #28A67E #2850A6

monochromatic

#431A10 #752C1C #A63F28 #D0563B #DC816D

Accessibility & contrast

On white

6.24

#A63F28 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#A63F28 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63F28

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63F28	#FFFFFF	#000000	##FFFFFF
##A63F28	1.00	6.24	3.36	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5225

Deuteranopia (green-blind)

#756925

Tritanopia (blue-blind)

#B7263A

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63f28;
/* rgb */ color: rgb(166, 63, 40);
/* oklch */ color: oklch(50.6% 0.141 34.1);

Tailwind

colors: {
  custom: {
    50: '#c87863',
    500: '#a63f28',
    950: '#000000',
  },
}

SCSS

$custom: #a63f28;
$custom-light: #c87863;
$custom-dark: #000000;

JSON

{
  "hex": "#a63f28",
  "rgb": {
    "r": 166,
    "g": 63,
    "b": 40
  },
  "hsl": {
    "h": 10.952,
    "s": 61.165,
    "l": 40.392
  },
  "oklch": {
    "l": 0.50637,
    "c": 0.14109,
    "h": 34.1
  },
  "luminance": 0.11815
}

Semantic roles & 50–950 ramp

primary

#A63F28

secondary

#67B2C2

accent

#C7E444

background

#FDF7F5

surface

#FAEDEA

border

#D3C8C6

text

#140905

muted

#837B79

Preview Lab

Preview with #A63F28

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

Preview Lab → · Contrast checker → · Palette generator →