#A63B3F#A63B3F

#A63B3F is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.5% C 0.141 H 21.6°. Best body text is #FFFFFF at 6.33:1 contrast (WCAG AA passes).

Color values

HEX	#A63B3F
RGB	rgb(166, 59, 63)
HSL	hsl(358, 48%, 44%)
HSV	hsv(358, 64%, 65%)
CMYK	cmyk(0%, 64.5%, 62%, 34.9%)
CIE-LAB	lab(40.57, 44.31, 21.50)
CIE-LCH	lch(40.57, 49.25, 25.88°)
OKLab	oklab(50.47% 0.1312 0.0519)
OKLCH	oklch(50.47% 0.141 21.6)
XYZ	xyz(18.1888, 11.5962, 5.9822)
Luminance	0.1159 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63B3F #3BA6A2

analogous

#A63B75 #A63B3F #A66D3B

triadic

#A63B3F #3FA63B #3B3FA6

tetradic

#A63B3F #75A63B #3BA6A2 #6D3BA6

square

#A63B3F #75A63B #3BA6A2 #6D3BA6

split-complementary

#A63B3F #3BA66D #3B75A6

monochromatic

#4C1B1D #792B2E #A63B3F #C45A5E #D4878A

Accessibility & contrast

On white

6.33

#A63B3F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.32

#A63B3F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63B3F

6.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63B3F	#FFFFFF	#000000	##FFFFFF
##A63B3F	1.00	6.33	3.32	6.33
#FFFFFF	6.33	1.00	21.00	1.00
#000000	3.32	21.00	1.00	21.00
##FFFFFF	6.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#56513E

Deuteranopia (green-blind)

#71683C

Tritanopia (blue-blind)

#B6253D

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63b3f;
/* rgb */ color: rgb(166, 59, 63);
/* oklch */ color: oklch(50.5% 0.141 21.6);

Tailwind

colors: {
  custom: {
    50: '#c67674',
    500: '#a63b3f',
    950: '#000000',
  },
}

SCSS

$custom: #a63b3f;
$custom-light: #c67674;
$custom-dark: #000000;

JSON

{
  "hex": "#a63b3f",
  "rgb": {
    "r": 166,
    "g": 59,
    "b": 63
  },
  "hsl": {
    "h": 357.757,
    "s": 47.556,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50474,
    "c": 0.14111,
    "h": 21.6
  },
  "luminance": 0.11594
}

Semantic roles & 50–950 ramp

primary

#A63B3F

secondary

#7EBFBC

accent

#D7D251

background

#FDF7F7

surface

#FAEDED

border

#D3C8C8

text

#140908

muted

#837B7B

Preview Lab

Preview with #A63B3F

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

Preview Lab → · Contrast checker → · Palette generator →