#C63738#C63738

#C63738 is a mid, vivid red. Relative luminance 0.150; OKLCH L 55.3% C 0.180 H 25.0°. Best body text is #FFFFFF at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#C63738
RGB	rgb(198, 55, 56)
HSL	hsl(360, 57%, 50%)
HSV	hsv(360, 72%, 78%)
CMYK	cmyk(0%, 72.2%, 71.7%, 22.4%)
CIE-LAB	lab(45.67, 56.11, 33.28)
CIE-LCH	lch(45.67, 65.24, 30.67°)
OKLab	oklab(55.33% 0.1632 0.076)
OKLCH	oklch(55.33% 0.18 25)
XYZ	xyz(25.3715, 15.0275, 5.3053)
Luminance	0.1502 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C63738 #37C6C5

analogous

#C63780 #C63738 #C67D37

triadic

#C63738 #38C637 #3738C6

tetradic

#C63738 #80C637 #37C6C5 #7D37C6

square

#C63738 #80C637 #37C6C5 #7D37C6

split-complementary

#C63738 #37C67D #3780C6

monochromatic

#661C1D #962A2A #C63738 #D46667 #E29696

Accessibility & contrast

On white

5.24

#C63738 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.00

#C63738 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C63738

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C63738	#FFFFFF	#000000	##FFFFFF
##C63738	1.00	5.24	4.00	5.24
#FFFFFF	5.24	1.00	21.00	1.00
#000000	4.00	21.00	1.00	21.00
##FFFFFF	5.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#605837

Deuteranopia (green-blind)

#847733

Tritanopia (blue-blind)

#DA0039

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #c63738;
/* rgb */ color: rgb(198, 55, 56);
/* oklch */ color: oklch(55.3% 0.180 25.0);

Tailwind

colors: {
  custom: {
    50: '#e0786f',
    500: '#c63738',
    950: '#000000',
  },
}

SCSS

$custom: #c63738;
$custom-light: #e0786f;
$custom-dark: #000000;

JSON

{
  "hex": "#c63738",
  "rgb": {
    "r": 198,
    "g": 55,
    "b": 56
  },
  "hsl": {
    "h": 359.58,
    "s": 56.522,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55331,
    "c": 0.18003,
    "h": 25
  },
  "luminance": 0.15024
}

Semantic roles & 50–950 ramp

primary

#C63738

secondary

#8CCDCD

accent

#E0DF48

background

#FEF7F6

surface

#FDEEEC

border

#D5C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #C63738

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

Preview Lab → · Contrast checker → · Palette generator →