#CB3837#CB3837

#CB3837 is a mid, vivid red. Relative luminance 0.158; OKLCH L 56.3% C 0.184 H 25.7°. Best body text is #FFFFFF at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#CB3837
RGB	rgb(203, 56, 55)
HSL	hsl(0, 59%, 51%)
HSV	hsv(0, 73%, 80%)
CMYK	cmyk(0%, 72.4%, 72.9%, 20.4%)
CIE-LAB	lab(46.72, 57.27, 35.31)
CIE-LCH	lch(46.72, 67.28, 31.65°)
OKLab	oklab(56.28% 0.1661 0.0799)
OKLCH	oklch(56.28% 0.184 25.7)
XYZ	xyz(26.7354, 15.8048, 5.2566)
Luminance	0.1580 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3837 #37CACB

analogous

#CB3780 #CB3837 #CB8237

triadic

#CB3837 #37CB38 #3837CB

tetradic

#CB3837 #80CB37 #37CACB #8237CB

square

#CB3837 #80CB37 #37CACB #8237CB

split-complementary

#CB3837 #37CB82 #3780CB

monochromatic

#6C1D1C #9C2929 #CB3837 #D86868 #E49998

Accessibility & contrast

On white

5.05

#CB3837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.16

#CB3837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3837

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3837	#FFFFFF	#000000	##FFFFFF
##CB3837	1.00	5.05	4.16	5.05
#FFFFFF	5.05	1.00	21.00	1.00
#000000	4.16	21.00	1.00	21.00
##FFFFFF	5.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#635A35

Deuteranopia (green-blind)

#887A32

Tritanopia (blue-blind)

#DF003A

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #cb3837;
/* rgb */ color: rgb(203, 56, 55);
/* oklch */ color: oklch(56.3% 0.184 25.7);

Tailwind

colors: {
  custom: {
    50: '#e4796e',
    500: '#cb3837',
    950: '#000000',
  },
}

SCSS

$custom: #cb3837;
$custom-light: #e4796e;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3837",
  "rgb": {
    "r": 203,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.405,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56275,
    "c": 0.18428,
    "h": 25.7
  },
  "luminance": 0.15801
}

Semantic roles & 50–950 ramp

primary

#CB3837

secondary

#8ECFD0

accent

#E1E246

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3837

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

Preview Lab → · Contrast checker → · Palette generator →