#CC3737#CC3737

#CC3737 is a mid, vivid red. Relative luminance 0.158; OKLCH L 56.4% C 0.186 H 25.5°. Best body text is #FFFFFF at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#CC3737
RGB	rgb(204, 55, 55)
HSL	hsl(0, 59%, 51%)
HSV	hsv(0, 73%, 80%)
CMYK	cmyk(0%, 73%, 73%, 20%)
CIE-LAB	lab(46.78, 57.94, 35.43)
CIE-LCH	lch(46.78, 67.91, 31.44°)
OKLab	oklab(56.35% 0.168 0.0801)
OKLCH	oklch(56.35% 0.186 25.5)
XYZ	xyz(26.9607, 15.8497, 5.2534)
Luminance	0.1585 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CC3737 #37CCCC

analogous

#CC3781 #CC3737 #CC8137

triadic

#CC3737 #37CC37 #3737CC

tetradic

#CC3737 #81CC37 #37CCCC #8137CC

square

#CC3737 #81CC37 #37CCCC #8137CC

split-complementary

#CC3737 #37CC81 #3781CC

monochromatic

#6D1C1C #9E2828 #CC3737 #D86868 #E59999

Accessibility & contrast

On white

5.04

#CC3737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.17

#CC3737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CC3737

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CC3737	#FFFFFF	#000000	##FFFFFF
##CC3737	1.00	5.04	4.17	5.04
#FFFFFF	5.04	1.00	21.00	1.00
#000000	4.17	21.00	1.00	21.00
##FFFFFF	5.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#635A35

Deuteranopia (green-blind)

#887B32

Tritanopia (blue-blind)

#E00039

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #cc3737;
/* rgb */ color: rgb(204, 55, 55);
/* oklch */ color: oklch(56.4% 0.186 25.5);

Tailwind

colors: {
  custom: {
    50: '#e4796e',
    500: '#cc3737',
    950: '#000000',
  },
}

SCSS

$custom: #cc3737;
$custom-light: #e4796e;
$custom-dark: #000000;

JSON

{
  "hex": "#cc3737",
  "rgb": {
    "r": 204,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.56354,
    "c": 0.18615,
    "h": 25.5
  },
  "luminance": 0.15846
}

Semantic roles & 50–950 ramp

primary

#CC3737

secondary

#8ED0D0

accent

#E3E345

background

#FFF7F6

surface

#FFEEEC

border

#D7C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CC3737

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

Preview Lab → · Contrast checker → · Palette generator →