#CA3637#CA3637

#CA3637 is a mid, vivid red. Relative luminance 0.155; OKLCH L 55.9% C 0.185 H 25.2°. Best body text is #FFFFFF at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#CA3637
RGB	rgb(202, 54, 55)
HSL	hsl(360, 58%, 50%)
HSV	hsv(360, 73%, 79%)
CMYK	cmyk(0%, 73.3%, 72.8%, 20.8%)
CIE-LAB	lab(46.28, 57.66, 34.76)
CIE-LCH	lch(46.28, 67.33, 31.08°)
OKLab	oklab(55.91% 0.1674 0.0788)
OKLCH	oklch(55.91% 0.185 25.2)
XYZ	xyz(26.3689, 15.4748, 5.2122)
Luminance	0.1547 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CA3637 #36CAC9

analogous

#CA3681 #CA3637 #CA7F36

triadic

#CA3637 #37CA36 #3637CA

tetradic

#CA3637 #81CA36 #36CAC9 #7F36CA

square

#CA3637 #81CA36 #36CAC9 #7F36CA

split-complementary

#CA3637 #36CA7F #3681CA

monochromatic

#6A1C1C #9A2929 #CA3637 #D76667 #E49797

Accessibility & contrast

On white

5.13

#CA3637 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.09

#CA3637 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CA3637

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CA3637	#FFFFFF	#000000	##FFFFFF
##CA3637	1.00	5.13	4.09	5.13
#FFFFFF	5.13	1.00	21.00	1.00
#000000	4.09	21.00	1.00	21.00
##FFFFFF	5.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625935

Deuteranopia (green-blind)

#867932

Tritanopia (blue-blind)

#DE0038

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #ca3637;
/* rgb */ color: rgb(202, 54, 55);
/* oklch */ color: oklch(55.9% 0.185 25.2);

Tailwind

colors: {
  custom: {
    50: '#e3786e',
    500: '#ca3637',
    950: '#000000',
  },
}

SCSS

$custom: #ca3637;
$custom-light: #e3786e;
$custom-dark: #000000;

JSON

{
  "hex": "#ca3637",
  "rgb": {
    "r": 202,
    "g": 54,
    "b": 55
  },
  "hsl": {
    "h": 359.595,
    "s": 58.268,
    "l": 50.196
  },
  "oklch": {
    "l": 0.55914,
    "c": 0.18502,
    "h": 25.2
  },
  "luminance": 0.15471
}

Semantic roles & 50–950 ramp

primary

#CA3637

secondary

#8DCFCF

accent

#E1E046

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CA3637

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

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