#CB3637#CB3637

#CB3637 is a mid, vivid red. Relative luminance 0.156; OKLCH L 56.1% C 0.186 H 25.2°. Best body text is #FFFFFF at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#CB3637
RGB	rgb(203, 54, 55)
HSL	hsl(360, 59%, 50%)
HSV	hsv(360, 73%, 80%)
CMYK	cmyk(0%, 73.4%, 72.9%, 20.4%)
CIE-LAB	lab(46.47, 57.97, 35.02)
CIE-LCH	lch(46.47, 67.73, 31.14°)
OKLab	oklab(56.09% 0.1683 0.0793)
OKLCH	oklch(56.09% 0.186 25.2)
XYZ	xyz(26.6404, 15.6148, 5.2249)
Luminance	0.1561 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3637 #36CBCA

analogous

#CB3682 #CB3637 #CB7F36

triadic

#CB3637 #37CB36 #3637CB

tetradic

#CB3637 #82CB36 #36CBCA #7F36CB

square

#CB3637 #82CB36 #36CBCA #7F36CB

split-complementary

#CB3637 #36CB7F #3682CB

monochromatic

#6B1C1C #9C2829 #CB3637 #D86767 #E49798

Accessibility & contrast

On white

5.09

#CB3637 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.12

#CB3637 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3637

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3637	#FFFFFF	#000000	##FFFFFF
##CB3637	1.00	5.09	4.12	5.09
#FFFFFF	5.09	1.00	21.00	1.00
#000000	4.12	21.00	1.00	21.00
##FFFFFF	5.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625A35

Deuteranopia (green-blind)

#877A32

Tritanopia (blue-blind)

#DF0038

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #cb3637;
/* rgb */ color: rgb(203, 54, 55);
/* oklch */ color: oklch(56.1% 0.186 25.2);

Tailwind

colors: {
  custom: {
    50: '#e4786e',
    500: '#cb3637',
    950: '#000000',
  },
}

SCSS

$custom: #cb3637;
$custom-light: #e4786e;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3637",
  "rgb": {
    "r": 203,
    "g": 54,
    "b": 55
  },
  "hsl": {
    "h": 359.597,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.56087,
    "c": 0.18601,
    "h": 25.2
  },
  "luminance": 0.15611
}

Semantic roles & 50–950 ramp

primary

#CB3637

secondary

#8DD0CF

accent

#E2E146

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3637

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

Preview Lab → · Contrast checker → · Palette generator →