#C63737#C63737

#C63737 is a mid, vivid red. Relative luminance 0.150; OKLCH L 55.3% C 0.180 H 25.3°. Best body text is #FFFFFF at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#C63737
RGB	rgb(198, 55, 55)
HSL	hsl(0, 57%, 50%)
HSV	hsv(0, 72%, 78%)
CMYK	cmyk(0%, 72.2%, 72.2%, 22.4%)
CIE-LAB	lab(45.66, 56.07, 33.85)
CIE-LCH	lch(45.66, 65.49, 31.12°)
OKLab	oklab(55.32% 0.1629 0.077)
OKLCH	oklch(55.32% 0.18 25.3)
XYZ	xyz(25.3473, 15.0178, 5.1778)
Luminance	0.1501 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C63737 #37C6C6

analogous

#C6377F #C63737 #C67F37

triadic

#C63737 #37C637 #3737C6

tetradic

#C63737 #7FC637 #37C6C6 #7F37C6

square

#C63737 #7FC637 #37C6C6 #7F37C6

split-complementary

#C63737 #37C67F #377FC6

monochromatic

#661C1C #962A2A #C63737 #D46666 #E29696

Accessibility & contrast

On white

5.25

#C63737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.00

#C63737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C63737

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C63737	#FFFFFF	#000000	##FFFFFF
##C63737	1.00	5.25	4.00	5.25
#FFFFFF	5.25	1.00	21.00	1.00
#000000	4.00	21.00	1.00	21.00
##FFFFFF	5.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#615835

Deuteranopia (green-blind)

#847732

Tritanopia (blue-blind)

#DA0039

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #c63737;
/* rgb */ color: rgb(198, 55, 55);
/* oklch */ color: oklch(55.3% 0.180 25.3);

Tailwind

colors: {
  custom: {
    50: '#e0786e',
    500: '#c63737',
    950: '#000000',
  },
}

SCSS

$custom: #c63737;
$custom-light: #e0786e;
$custom-dark: #000000;

JSON

{
  "hex": "#c63737",
  "rgb": {
    "r": 198,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 56.522,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55317,
    "c": 0.18014,
    "h": 25.3
  },
  "luminance": 0.15014
}

Semantic roles & 50–950 ramp

primary

#C63737

secondary

#8CCDCD

accent

#E0E048

background

#FEF7F6

surface

#FDEEEC

border

#D5C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #C63737

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

Preview Lab → · Contrast checker → · Palette generator →