#A63D37#A63D37

#A63D37 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.6% C 0.140 H 26.6°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#A63D37
RGB	rgb(166, 61, 55)
HSL	hsl(3, 50%, 43%)
HSV	hsv(3, 67%, 65%)
CMYK	cmyk(0%, 63.3%, 66.9%, 34.9%)
CIE-LAB	lab(40.77, 42.88, 26.63)
CIE-LCH	lch(40.77, 50.48, 31.84°)
OKLab	oklab(50.59% 0.1252 0.0626)
OKLCH	oklch(50.59% 0.14 26.6)
XYZ	xyz(18.0860, 11.7228, 4.9240)
Luminance	0.1172 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63D37 #37A0A6

analogous

#A63768 #A63D37 #A67437

triadic

#A63D37 #37A63D #3D37A6

tetradic

#A63D37 #68A637 #37A0A6 #7437A6

square

#A63D37 #68A637 #37A0A6 #7437A6

split-complementary

#A63D37 #37A674 #3768A6

monochromatic

#4A1B19 #782C28 #A63D37 #C65A54 #D68682

Accessibility & contrast

On white

6.28

#A63D37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#A63D37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63D37

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63D37	#FFFFFF	#000000	##FFFFFF
##A63D37	1.00	6.28	3.34	6.28
#FFFFFF	6.28	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595236

Deuteranopia (green-blind)

#736934

Tritanopia (blue-blind)

#B6263C

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63d37;
/* rgb */ color: rgb(166, 61, 55);
/* oklch */ color: oklch(50.6% 0.140 26.6);

Tailwind

colors: {
  custom: {
    50: '#c7776e',
    500: '#a63d37',
    950: '#000000',
  },
}

SCSS

$custom: #a63d37;
$custom-light: #c7776e;
$custom-dark: #000000;

JSON

{
  "hex": "#a63d37",
  "rgb": {
    "r": 166,
    "g": 61,
    "b": 55
  },
  "hsl": {
    "h": 3.243,
    "s": 50.226,
    "l": 43.333
  },
  "oklch": {
    "l": 0.50585,
    "c": 0.13994,
    "h": 26.6
  },
  "luminance": 0.1172
}

Semantic roles & 50–950 ramp

primary

#A63D37

secondary

#7ABBBF

accent

#D2DA4E

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140907

muted

#837B7A

Preview Lab

Preview with #A63D37

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

Preview Lab → · Contrast checker → · Palette generator →