#CB3537#CB3537

#CB3537 is a mid, vivid red. Relative luminance 0.155; OKLCH L 56.0% C 0.187 H 25.0°. Best body text is #FFFFFF at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#CB3537
RGB	rgb(203, 53, 55)
HSL	hsl(359, 59%, 50%)
HSV	hsv(359, 74%, 80%)
CMYK	cmyk(0%, 73.9%, 72.9%, 20.4%)
CIE-LAB	lab(46.34, 58.31, 34.88)
CIE-LCH	lch(46.34, 67.95, 30.88°)
OKLab	oklab(56% 0.1694 0.079)
OKLCH	oklch(56% 0.187 25)
XYZ	xyz(26.5943, 15.5226, 5.2095)
Luminance	0.1552 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CB3537 #35CBC9

analogous

#CB3582 #CB3537 #CB7E35

triadic

#CB3537 #37CB35 #3537CB

tetradic

#CB3537 #82CB35 #35CBC9 #7E35CB

square

#CB3537 #82CB35 #35CBC9 #7E35CB

split-complementary

#CB3537 #35CB7E #3582CB

monochromatic

#6A1B1C #9B2829 #CB3537 #D86667 #E49697

Accessibility & contrast

On white

5.12

#CB3537 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#CB3537 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CB3537

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CB3537	#FFFFFF	#000000	##FFFFFF
##CB3537	1.00	5.12	4.10	5.12
#FFFFFF	5.12	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#615935

Deuteranopia (green-blind)

#877A32

Tritanopia (blue-blind)

#DF0038

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #cb3537;
/* rgb */ color: rgb(203, 53, 55);
/* oklch */ color: oklch(56.0% 0.187 25.0);

Tailwind

colors: {
  custom: {
    50: '#e4786e',
    500: '#cb3537',
    950: '#000000',
  },
}

SCSS

$custom: #cb3537;
$custom-light: #e4786e;
$custom-dark: #000000;

JSON

{
  "hex": "#cb3537",
  "rgb": {
    "r": 203,
    "g": 53,
    "b": 55
  },
  "hsl": {
    "h": 359.2,
    "s": 59.055,
    "l": 50.196
  },
  "oklch": {
    "l": 0.55996,
    "c": 0.18687,
    "h": 25
  },
  "luminance": 0.15519
}

Semantic roles & 50–950 ramp

primary

#CB3537

secondary

#8CCFCF

accent

#E2E046

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CB3537

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

Preview Lab → · Contrast checker → · Palette generator →