#C43837#C43837

#C43837 is a mid, vivid red. Relative luminance 0.148; OKLCH L 55.1% C 0.177 H 25.5°. Best body text is #FFFFFF at 5.29:1 contrast (WCAG AA passes).

Color values

HEX	#C43837
RGB	rgb(196, 56, 55)
HSL	hsl(0, 56%, 49%)
HSV	hsv(0, 72%, 77%)
CMYK	cmyk(0%, 71.4%, 71.9%, 23.1%)
CIE-LAB	lab(45.42, 55.07, 33.48)
CIE-LCH	lch(45.42, 64.45, 31.29°)
OKLab	oklab(55.07% 0.16 0.0763)
OKLCH	oklch(55.07% 0.177 25.5)
XYZ	xyz(24.8715, 14.8437, 5.1692)
Luminance	0.1484 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C43837 #37C3C4

analogous

#C4377C #C43837 #C47F37

triadic

#C43837 #37C438 #3837C4

tetradic

#C43837 #7CC437 #37C3C4 #7F37C4

square

#C43837 #7CC437 #37C3C4 #7F37C4

split-complementary

#C43837 #37C47F #377CC4

monochromatic

#641D1C #942A2A #C43837 #D46565 #E19594

Accessibility & contrast

On white

5.29

#C43837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.97

#C43837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C43837

5.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C43837	#FFFFFF	#000000	##FFFFFF
##C43837	1.00	5.29	3.97	5.29
#FFFFFF	5.29	1.00	21.00	1.00
#000000	3.97	21.00	1.00	21.00
##FFFFFF	5.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#605835

Deuteranopia (green-blind)

#837732

Tritanopia (blue-blind)

#D80039

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #c43837;
/* rgb */ color: rgb(196, 56, 55);
/* oklch */ color: oklch(55.1% 0.177 25.5);

Tailwind

colors: {
  custom: {
    50: '#de786e',
    500: '#c43837',
    950: '#000000',
  },
}

SCSS

$custom: #c43837;
$custom-light: #de786e;
$custom-dark: #000000;

JSON

{
  "hex": "#c43837",
  "rgb": {
    "r": 196,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.426,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.55071,
    "c": 0.17722,
    "h": 25.5
  },
  "luminance": 0.1484
}

Semantic roles & 50–950 ramp

primary

#C43837

secondary

#8BCCCC

accent

#DEDF48

background

#FEF7F6

surface

#FDEEEC

border

#D5C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #C43837

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

Preview Lab → · Contrast checker → · Palette generator →