#A63B2B#A63B2B

#A63B2B is a mid, vivid red. Relative luminance 0.114; OKLCH L 50.2% C 0.144 H 31.1°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#A63B2B
RGB	rgb(166, 59, 43)
HSL	hsl(8, 59%, 41%)
HSV	hsv(8, 74%, 65%)
CMYK	cmyk(0%, 64.5%, 74.1%, 34.9%)
CIE-LAB	lab(40.27, 43.15, 33.09)
CIE-LCH	lch(40.27, 54.38, 37.48°)
OKLab	oklab(50.15% 0.1236 0.0746)
OKLCH	oklch(50.15% 0.144 31.1)
XYZ	xyz(17.7278, 11.4118, 3.5542)
Luminance	0.1141 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B2B #2B96A6

analogous

#A62B58 #A63B2B #A6782B

triadic

#A63B2B #2BA63B #3B2BA6

tetradic

#A63B2B #58A62B #2B96A6 #782BA6

square

#A63B2B #58A62B #2B96A6 #782BA6

split-complementary

#A63B2B #2BA678 #2B58A6

monochromatic

#451812 #752A1E #A63B2B #CE5341 #DA7F71

Accessibility & contrast

On white

6.40

#A63B2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#A63B2B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B2B

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B2B	#FFFFFF	#000000	##FFFFFF
##A63B2B	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595029

Deuteranopia (green-blind)

#736828

Tritanopia (blue-blind)

#B72038

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #a63b2b;
/* rgb */ color: rgb(166, 59, 43);
/* oklch */ color: oklch(50.2% 0.144 31.1);

Tailwind

colors: {
  custom: {
    50: '#c87665',
    500: '#a63b2b',
    950: '#000000',
  },
}

SCSS

$custom: #a63b2b;
$custom-light: #c87665;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b2b",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 43
  },
  "hsl": {
    "h": 7.805,
    "s": 58.852,
    "l": 40.98
  },
  "oklch": {
    "l": 0.50151,
    "c": 0.14436,
    "h": 31.1
  },
  "luminance": 0.11409
}

Semantic roles & 50–950 ramp

primary

#A63B2B

secondary

#6BB6C1

accent

#CEE246

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140905

muted

#837B7A

Preview Lab

Preview with #A63B2B

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

Preview Lab → · Contrast checker → · Palette generator →