#CB3739#CB3739

#CB3739 is a mid, vivid red. Relative luminance 0.157; OKLCH L 56.2% C 0.185 H 24.8°. Best body text is #FFFFFF at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#CB3739
RGB	rgb(203, 55, 57)
HSL	hsl(359, 59%, 51%)
HSV	hsv(359, 73%, 80%)
CMYK	cmyk(0%, 72.9%, 71.9%, 20.4%)
CIE-LAB	lab(46.62, 57.71, 34.04)
CIE-LCH	lch(46.62, 67.00, 30.53°)
OKLab	oklab(56.21% 0.1679 0.0775)
OKLCH	oklch(56.21% 0.185 24.8)
XYZ	xyz(26.7363, 15.7284, 5.4982)
Luminance	0.1572 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3739 #37CBC9

analogous

#CB3783 #CB3739 #CB7F37

triadic

#CB3739 #39CB37 #3739CB

tetradic

#CB3739 #83CB37 #37CBC9 #7F37CB

square

#CB3739 #83CB37 #37CBC9 #7F37CB

split-complementary

#CB3739 #37CB7F #3783CB

monochromatic

#6C1C1D #9C292A #CB3739 #D86869 #E49899

Accessibility & contrast

On white

5.07

#CB3739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.14

#CB3739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3739

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3739	#FFFFFF	#000000	##FFFFFF
##CB3739	1.00	5.07	4.14	5.07
#FFFFFF	5.07	1.00	21.00	1.00
#000000	4.14	21.00	1.00	21.00
##FFFFFF	5.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625A38

Deuteranopia (green-blind)

#877A34

Tritanopia (blue-blind)

#DF003A

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #cb3739;
/* rgb */ color: rgb(203, 55, 57);
/* oklch */ color: oklch(56.2% 0.185 24.8);

Tailwind

colors: {
  custom: {
    50: '#e3796f',
    500: '#cb3739',
    950: '#000000',
  },
}

SCSS

$custom: #cb3739;
$custom-light: #e3796f;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3739",
  "rgb": {
    "r": 203,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.189,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56208,
    "c": 0.18492,
    "h": 24.8
  },
  "luminance": 0.15724
}

Semantic roles & 50–950 ramp

primary

#CB3739

secondary

#8ED0CF

accent

#E2E046

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3739

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

Preview Lab → · Contrast checker → · Palette generator →