#C43739#C43739

#C43739 is a mid, vivid red. Relative luminance 0.148; OKLCH L 55.0% C 0.178 H 24.5°. Best body text is #FFFFFF at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#C43739
RGB	rgb(196, 55, 57)
HSL	hsl(359, 56%, 49%)
HSV	hsv(359, 72%, 77%)
CMYK	cmyk(0%, 71.9%, 70.9%, 23.1%)
CIE-LAB	lab(45.31, 55.53, 32.18)
CIE-LCH	lch(45.31, 64.18, 30.10°)
OKLab	oklab(55% 0.1618 0.0738)
OKLCH	oklch(55% 0.178 24.5)
XYZ	xyz(24.8724, 14.7673, 5.4108)
Luminance	0.1476 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C43739 #37C4C2

analogous

#C43780 #C43739 #C47C37

triadic

#C43739 #39C437 #3739C4

tetradic

#C43739 #80C437 #37C4C2 #7C37C4

square

#C43739 #80C437 #37C4C2 #7C37C4

split-complementary

#C43739 #37C47C #3780C4

monochromatic

#641C1D #942A2B #C43739 #D46566 #E19495

Accessibility & contrast

On white

5.31

#C43739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.95

#C43739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C43739

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C43739	#FFFFFF	#000000	##FFFFFF
##C43739	1.00	5.31	3.95	5.31
#FFFFFF	5.31	1.00	21.00	1.00
#000000	3.95	21.00	1.00	21.00
##FFFFFF	5.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#605838

Deuteranopia (green-blind)

#837634

Tritanopia (blue-blind)

#D70039

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #c43739;
/* rgb */ color: rgb(196, 55, 57);
/* oklch */ color: oklch(55.0% 0.178 24.5);

Tailwind

colors: {
  custom: {
    50: '#de786f',
    500: '#c43739',
    950: '#000000',
  },
}

SCSS

$custom: #c43739;
$custom-light: #de786f;
$custom-dark: #000000;

JSON

{
  "hex": "#c43739",
  "rgb": {
    "r": 196,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.149,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.55001,
    "c": 0.17788,
    "h": 24.5
  },
  "luminance": 0.14764
}

Semantic roles & 50–950 ramp

primary

#C43739

secondary

#8BCCCB

accent

#DFDD48

background

#FEF7F6

surface

#FDEEEC

border

#D5C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #C43739

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

Preview Lab → · Contrast checker → · Palette generator →