#A63E37#A63E37

#A63E37 is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.7% C 0.139 H 27.0°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#A63E37
RGB	rgb(166, 62, 55)
HSL	hsl(4, 50%, 43%)
HSV	hsv(4, 67%, 65%)
CMYK	cmyk(0%, 62.7%, 66.9%, 34.9%)
CIE-LAB	lab(40.95, 42.42, 26.84)
CIE-LCH	lch(40.95, 50.20, 32.32°)
OKLab	oklab(50.72% 0.1237 0.063)
OKLCH	oklch(50.72% 0.139 27)
XYZ	xyz(18.1399, 11.8305, 4.9420)
Luminance	0.1183 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63E37 #379FA6

analogous

#A63767 #A63E37 #A67537

triadic

#A63E37 #37A63E #3E37A6

tetradic

#A63E37 #67A637 #379FA6 #7537A6

square

#A63E37 #67A637 #379FA6 #7537A6

split-complementary

#A63E37 #37A675 #3767A6

monochromatic

#4A1C19 #782D28 #A63E37 #C65B54 #D68782

Accessibility & contrast

On white

6.24

#A63E37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#A63E37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63E37

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63E37	#FFFFFF	#000000	##FFFFFF
##A63E37	1.00	6.24	3.37	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595236

Deuteranopia (green-blind)

#736934

Tritanopia (blue-blind)

#B6273D

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #a63e37;
/* rgb */ color: rgb(166, 62, 55);
/* oklch */ color: oklch(50.7% 0.139 27.0);

Tailwind

colors: {
  custom: {
    50: '#c7786e',
    500: '#a63e37',
    950: '#000000',
  },
}

SCSS

$custom: #a63e37;
$custom-light: #c7786e;
$custom-dark: #000000;

JSON

{
  "hex": "#a63e37",
  "rgb": {
    "r": 166,
    "g": 62,
    "b": 55
  },
  "hsl": {
    "h": 3.784,
    "s": 50.226,
    "l": 43.333
  },
  "oklch": {
    "l": 0.50715,
    "c": 0.13886,
    "h": 27
  },
  "luminance": 0.11828
}

Semantic roles & 50–950 ramp

primary

#A63E37

secondary

#7ABBBF

accent

#D1DA4E

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#140907

muted

#837B7A

Preview Lab

Preview with #A63E37

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

Preview Lab → · Contrast checker → · Palette generator →