#CB3539#CB3539

#CB3539 is a mid, vivid red. Relative luminance 0.155; OKLCH L 56.0% C 0.187 H 24.3°. Best body text is #FFFFFF at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#CB3539
RGB	rgb(203, 53, 57)
HSL	hsl(358, 59%, 50%)
HSV	hsv(358, 74%, 80%)
CMYK	cmyk(0%, 73.9%, 71.9%, 20.4%)
CIE-LAB	lab(46.37, 58.40, 33.75)
CIE-LCH	lch(46.37, 67.45, 30.02°)
OKLab	oklab(56.02% 0.1701 0.0769)
OKLCH	oklch(56.02% 0.187 24.3)
XYZ	xyz(26.6433, 15.5422, 5.4672)
Luminance	0.1554 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3539 #35CBC7

analogous

#CB3584 #CB3539 #CB7C35

triadic

#CB3539 #39CB35 #3539CB

tetradic

#CB3539 #84CB35 #35CBC7 #7C35CB

square

#CB3539 #84CB35 #35CBC7 #7C35CB

split-complementary

#CB3539 #35CB7C #3584CB

monochromatic

#6A1B1D #9B282B #CB3539 #D86669 #E49698

Accessibility & contrast

On white

5.11

#CB3539 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#CB3539 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3539

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3539	#FFFFFF	#000000	##FFFFFF
##CB3539	1.00	5.11	4.11	5.11
#FFFFFF	5.11	1.00	21.00	1.00
#000000	4.11	21.00	1.00	21.00
##FFFFFF	5.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#615938

Deuteranopia (green-blind)

#877A34

Tritanopia (blue-blind)

#DF0038

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #cb3539;
/* rgb */ color: rgb(203, 53, 57);
/* oklch */ color: oklch(56.0% 0.187 24.3);

Tailwind

colors: {
  custom: {
    50: '#e4786f',
    500: '#cb3539',
    950: '#000000',
  },
}

SCSS

$custom: #cb3539;
$custom-light: #e4786f;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3539",
  "rgb": {
    "r": 203,
    "g": 53,
    "b": 57
  },
  "hsl": {
    "h": 358.4,
    "s": 59.055,
    "l": 50.196
  },
  "oklch": {
    "l": 0.56024,
    "c": 0.18664,
    "h": 24.3
  },
  "luminance": 0.15538
}

Semantic roles & 50–950 ramp

primary

#CB3539

secondary

#8CCFCE

accent

#E2DE46

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3539

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

Preview Lab → · Contrast checker → · Palette generator →