#A63A28#A63A28

#A63A28 is a mid, vivid red. Relative luminance 0.113; OKLCH L 50.0% C 0.146 H 31.9°. Best body text is #FFFFFF at 6.45:1 contrast (WCAG AA passes).

Color values

HEX	#A63A28
RGB	rgb(166, 58, 40)
HSL	hsl(9, 61%, 40%)
HSV	hsv(9, 76%, 65%)
CMYK	cmyk(0%, 65.1%, 75.9%, 34.9%)
CIE-LAB	lab(40.06, 43.47, 34.57)
CIE-LCH	lch(40.06, 55.54, 38.49°)
OKLab	oklab(49.99% 0.124 0.0771)
OKLCH	oklch(49.99% 0.146 31.9)
XYZ	xyz(17.6239, 11.2888, 3.2580)
Luminance	0.1129 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63A28 #2894A6

analogous

#A62855 #A63A28 #A67928

triadic

#A63A28 #28A63A #3A28A6

tetradic

#A63A28 #55A628 #2894A6 #7928A6

square

#A63A28 #55A628 #2894A6 #7928A6

split-complementary

#A63A28 #28A679 #2855A6

monochromatic

#431810 #75291C #A63A28 #D0513B #DC7D6D

Accessibility & contrast

On white

6.45

#A63A28 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#A63A28 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63A28

6.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63A28	#FFFFFF	#000000	##FFFFFF
##A63A28	1.00	6.45	3.26	6.45
#FFFFFF	6.45	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#584F25

Deuteranopia (green-blind)

#736724

Tritanopia (blue-blind)

#B71D36

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #a63a28;
/* rgb */ color: rgb(166, 58, 40);
/* oklch */ color: oklch(50.0% 0.146 31.9);

Tailwind

colors: {
  custom: {
    50: '#c87563',
    500: '#a63a28',
    950: '#000000',
  },
}

SCSS

$custom: #a63a28;
$custom-light: #c87563;
$custom-dark: #000000;

JSON

{
  "hex": "#a63a28",
  "rgb": {
    "r": 166,
    "g": 58,
    "b": 40
  },
  "hsl": {
    "h": 8.571,
    "s": 61.165,
    "l": 40.392
  },
  "oklch": {
    "l": 0.49987,
    "c": 0.14598,
    "h": 31.9
  },
  "luminance": 0.11286
}

Semantic roles & 50–950 ramp

primary

#A63A28

secondary

#67B5C2

accent

#CDE444

background

#FDF7F5

surface

#FAEDEA

border

#D3C8C6

text

#150905

muted

#837B79

Preview Lab

Preview with #A63A28

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

Preview Lab → · Contrast checker → · Palette generator →