#C63739#C63739

#C63739 is a mid, vivid red. Relative luminance 0.150; OKLCH L 55.3% C 0.180 H 24.6°. Best body text is #FFFFFF at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#C63739
RGB	rgb(198, 55, 57)
HSL	hsl(359, 57%, 50%)
HSV	hsv(359, 72%, 78%)
CMYK	cmyk(0%, 72.2%, 71.2%, 22.4%)
CIE-LAB	lab(45.69, 56.16, 32.71)
CIE-LCH	lch(45.69, 64.99, 30.22°)
OKLab	oklab(55.35% 0.1636 0.0749)
OKLCH	oklch(55.35% 0.18 24.6)
XYZ	xyz(25.3962, 15.0374, 5.4354)
Luminance	0.1503 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C63739 #37C6C4

analogous

#C63781 #C63739 #C67D37

triadic

#C63739 #39C637 #3739C6

tetradic

#C63739 #81C637 #37C6C4 #7D37C6

square

#C63739 #81C637 #37C6C4 #7D37C6

split-complementary

#C63739 #37C67D #3781C6

monochromatic

#661C1D #962A2B #C63739 #D46667 #E29697

Accessibility & contrast

On white

5.24

#C63739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.01

#C63739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C63739

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C63739	#FFFFFF	#000000	##FFFFFF
##C63739	1.00	5.24	4.01	5.24
#FFFFFF	5.24	1.00	21.00	1.00
#000000	4.01	21.00	1.00	21.00
##FFFFFF	5.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#605938

Deuteranopia (green-blind)

#847734

Tritanopia (blue-blind)

#DA0039

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #c63739;
/* rgb */ color: rgb(198, 55, 57);
/* oklch */ color: oklch(55.3% 0.180 24.6);

Tailwind

colors: {
  custom: {
    50: '#e0786f',
    500: '#c63739',
    950: '#000000',
  },
}

SCSS

$custom: #c63739;
$custom-light: #e0786f;
$custom-dark: #000000;

JSON

{
  "hex": "#c63739",
  "rgb": {
    "r": 198,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.161,
    "s": 56.522,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55345,
    "c": 0.17991,
    "h": 24.6
  },
  "luminance": 0.15034
}

Semantic roles & 50–950 ramp

primary

#C63739

secondary

#8CCDCC

accent

#E0DE48

background

#FEF7F6

surface

#FDEEEC

border

#D5C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #C63739

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

Preview Lab → · Contrast checker → · Palette generator →