#C63537#C63537

#C63537 is a mid, vivid red. Relative luminance 0.148; OKLCH L 55.1% C 0.182 H 24.8°. Best body text is #FFFFFF at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#C63537
RGB	rgb(198, 53, 55)
HSL	hsl(359, 58%, 49%)
HSV	hsv(359, 73%, 78%)
CMYK	cmyk(0%, 73.2%, 72.2%, 22.4%)
CIE-LAB	lab(45.40, 56.77, 33.55)
CIE-LCH	lch(45.40, 65.95, 30.58°)
OKLab	oklab(55.13% 0.1651 0.0764)
OKLCH	oklch(55.13% 0.182 24.8)
XYZ	xyz(25.2543, 14.8317, 5.1467)
Luminance	0.1483 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#C63537 #35C6C4

analogous

#C63580 #C63537 #C67B35

triadic

#C63537 #37C635 #3537C6

tetradic

#C63537 #80C635 #35C6C4 #7B35C6

square

#C63537 #80C635 #35C6C4 #7B35C6

split-complementary

#C63537 #35C67B #3580C6

monochromatic

#651B1C #96282A #C63537 #D56365 #E29394

Accessibility & contrast

On white

5.30

#C63537 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.97

#C63537 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #C63537

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##C63537	#FFFFFF	#000000	##FFFFFF
##C63537	1.00	5.30	3.97	5.30
#FFFFFF	5.30	1.00	21.00	1.00
#000000	3.97	21.00	1.00	21.00
##FFFFFF	5.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F5836

Deuteranopia (green-blind)

#847732

Tritanopia (blue-blind)

#DA0038

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #c63537;
/* rgb */ color: rgb(198, 53, 55);
/* oklch */ color: oklch(55.1% 0.182 24.8);

Tailwind

colors: {
  custom: {
    50: '#e0776e',
    500: '#c63537',
    950: '#000000',
  },
}

SCSS

$custom: #c63537;
$custom-light: #e0776e;
$custom-dark: #000000;

JSON

{
  "hex": "#c63537",
  "rgb": {
    "r": 198,
    "g": 53,
    "b": 55
  },
  "hsl": {
    "h": 359.172,
    "s": 57.769,
    "l": 49.216
  },
  "oklch": {
    "l": 0.55126,
    "c": 0.1819,
    "h": 24.8
  },
  "luminance": 0.14828
}

Semantic roles & 50–950 ramp

primary

#C63537

secondary

#8ACDCC

accent

#E1DF47

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170907

muted

#857B7A

Preview Lab

Preview with #C63537

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

Preview Lab → · Contrast checker → · Palette generator →