#C43738#C43738

#C43738 is a mid, vivid red. Relative luminance 0.148; OKLCH L 55.0% C 0.178 H 24.9°. Best body text is #FFFFFF at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#C43738
RGB	rgb(196, 55, 56)
HSL	hsl(360, 56%, 49%)
HSV	hsv(360, 72%, 77%)
CMYK	cmyk(0%, 71.9%, 71.4%, 23.1%)
CIE-LAB	lab(45.30, 55.48, 32.75)
CIE-LCH	lch(45.30, 64.43, 30.56°)
OKLab	oklab(54.99% 0.1615 0.0749)
OKLCH	oklch(54.99% 0.178 24.9)
XYZ	xyz(24.8477, 14.7574, 5.2807)
Luminance	0.1475 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C43738 #37C4C3

analogous

#C4377F #C43738 #C47C37

triadic

#C43738 #38C437 #3738C4

tetradic

#C43738 #7FC437 #37C4C3 #7C37C4

square

#C43738 #7FC437 #37C4C3 #7C37C4

split-complementary

#C43738 #37C47C #377FC4

monochromatic

#641C1D #942A2A #C43738 #D46565 #E19495

Accessibility & contrast

On white

5.32

#C43738 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.95

#C43738 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C43738

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C43738	#FFFFFF	#000000	##FFFFFF
##C43738	1.00	5.32	3.95	5.32
#FFFFFF	5.32	1.00	21.00	1.00
#000000	3.95	21.00	1.00	21.00
##FFFFFF	5.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#605837

Deuteranopia (green-blind)

#837633

Tritanopia (blue-blind)

#D70039

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #c43738;
/* rgb */ color: rgb(196, 55, 56);
/* oklch */ color: oklch(55.0% 0.178 24.9);

Tailwind

colors: {
  custom: {
    50: '#de786f',
    500: '#c43738',
    950: '#000000',
  },
}

SCSS

$custom: #c43738;
$custom-light: #de786f;
$custom-dark: #000000;

JSON

{
  "hex": "#c43738",
  "rgb": {
    "r": 196,
    "g": 55,
    "b": 56
  },
  "hsl": {
    "h": 359.574,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.54986,
    "c": 0.17801,
    "h": 24.9
  },
  "luminance": 0.14754
}

Semantic roles & 50–950 ramp

primary

#C43738

secondary

#8BCCCC

accent

#DFDE48

background

#FEF7F6

surface

#FDEEEC

border

#D5C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #C43738

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

Preview Lab → · Contrast checker → · Palette generator →