#CB3639#CB3639

#CB3639 is a mid, vivid red. Relative luminance 0.156; OKLCH L 56.1% C 0.186 H 24.6°. Best body text is #FFFFFF at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#CB3639
RGB	rgb(203, 54, 57)
HSL	hsl(359, 59%, 50%)
HSV	hsv(359, 73%, 80%)
CMYK	cmyk(0%, 73.4%, 71.9%, 20.4%)
CIE-LAB	lab(46.49, 58.06, 33.89)
CIE-LCH	lch(46.49, 67.23, 30.27°)
OKLab	oklab(56.12% 0.169 0.0772)
OKLCH	oklch(56.12% 0.186 24.6)
XYZ	xyz(26.6893, 15.6343, 5.4825)
Luminance	0.1563 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3639 #36CBC8

analogous

#CB3683 #CB3639 #CB7D36

triadic

#CB3639 #39CB36 #3639CB

tetradic

#CB3639 #83CB36 #36CBC8 #7D36CB

square

#CB3639 #83CB36 #36CBC8 #7D36CB

split-complementary

#CB3639 #36CB7D #3683CB

monochromatic

#6B1C1D #9C282B #CB3639 #D86769 #E49799

Accessibility & contrast

On white

5.09

#CB3639 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.13

#CB3639 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3639

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3639	#FFFFFF	#000000	##FFFFFF
##CB3639	1.00	5.09	4.13	5.09
#FFFFFF	5.09	1.00	21.00	1.00
#000000	4.13	21.00	1.00	21.00
##FFFFFF	5.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625A38

Deuteranopia (green-blind)

#877A34

Tritanopia (blue-blind)

#DF0039

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #cb3639;
/* rgb */ color: rgb(203, 54, 57);
/* oklch */ color: oklch(56.1% 0.186 24.6);

Tailwind

colors: {
  custom: {
    50: '#e3786f',
    500: '#cb3639',
    950: '#000000',
  },
}

SCSS

$custom: #cb3639;
$custom-light: #e3786f;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3639",
  "rgb": {
    "r": 203,
    "g": 54,
    "b": 57
  },
  "hsl": {
    "h": 358.792,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.56115,
    "c": 0.18578,
    "h": 24.6
  },
  "luminance": 0.1563
}

Semantic roles & 50–950 ramp

primary

#CB3639

secondary

#8DD0CE

accent

#E2DF46

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3639

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

Preview Lab → · Contrast checker → · Palette generator →