#A63B28#A63B28

#A63B28 is a mid, vivid red. Relative luminance 0.114; OKLCH L 50.1% C 0.145 H 32.3°. Best body text is #FFFFFF at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#A63B28
RGB	rgb(166, 59, 40)
HSL	hsl(9, 61%, 40%)
HSV	hsv(9, 76%, 65%)
CMYK	cmyk(0%, 64.5%, 75.9%, 34.9%)
CIE-LAB	lab(40.23, 43.02, 34.75)
CIE-LCH	lch(40.23, 55.30, 38.93°)
OKLab	oklab(50.11% 0.1226 0.0775)
OKLCH	oklch(50.11% 0.145 32.3)
XYZ	xyz(17.6748, 11.3906, 3.2750)
Luminance	0.1139 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B28 #2893A6

analogous

#A62854 #A63B28 #A67A28

triadic

#A63B28 #28A63B #3B28A6

tetradic

#A63B28 #54A628 #2893A6 #7A28A6

square

#A63B28 #54A628 #2893A6 #7A28A6

split-complementary

#A63B28 #28A67A #2854A6

monochromatic

#431810 #75291C #A63B28 #D0523B #DC7D6D

Accessibility & contrast

On white

6.41

#A63B28 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#A63B28 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B28

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B28	#FFFFFF	#000000	##FFFFFF
##A63B28	1.00	6.41	3.28	6.41
#FFFFFF	6.41	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595025

Deuteranopia (green-blind)

#736824

Tritanopia (blue-blind)

#B71F37

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63b28;
/* rgb */ color: rgb(166, 59, 40);
/* oklch */ color: oklch(50.1% 0.145 32.3);

Tailwind

colors: {
  custom: {
    50: '#c87663',
    500: '#a63b28',
    950: '#000000',
  },
}

SCSS

$custom: #a63b28;
$custom-light: #c87663;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b28",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 40
  },
  "hsl": {
    "h": 9.048,
    "s": 61.165,
    "l": 40.392
  },
  "oklch": {
    "l": 0.50114,
    "c": 0.145,
    "h": 32.3
  },
  "luminance": 0.11388
}

Semantic roles & 50–950 ramp

primary

#A63B28

secondary

#67B5C2

accent

#CCE444

background

#FDF7F5

surface

#FAEDEA

border

#D3C8C6

text

#150905

muted

#837B79

Preview Lab

Preview with #A63B28

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

Preview Lab → · Contrast checker → · Palette generator →