#CA3737#CA3737

#CA3737 is a mid, vivid red. Relative luminance 0.156; OKLCH L 56.0% C 0.184 H 25.4°. Best body text is #FFFFFF at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#CA3737
RGB	rgb(202, 55, 55)
HSL	hsl(0, 58%, 50%)
HSV	hsv(0, 73%, 79%)
CMYK	cmyk(0%, 72.8%, 72.8%, 20.8%)
CIE-LAB	lab(46.40, 57.32, 34.90)
CIE-LCH	lch(46.40, 67.11, 31.34°)
OKLab	oklab(56.01% 0.1663 0.0791)
OKLCH	oklch(56.01% 0.184 25.4)
XYZ	xyz(26.4159, 15.5688, 5.2278)
Luminance	0.1557 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CA3737 #37CACA

analogous

#CA3780 #CA3737 #CA8037

triadic

#CA3737 #37CA37 #3737CA

tetradic

#CA3737 #80CA37 #37CACA #8037CA

square

#CA3737 #80CA37 #37CACA #8037CA

split-complementary

#CA3737 #37CA80 #3780CA

monochromatic

#6A1C1C #9B2929 #CA3737 #D76767 #E49898

Accessibility & contrast

On white

5.11

#CA3737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#CA3737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CA3737

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CA3737	#FFFFFF	#000000	##FFFFFF
##CA3737	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)

#625A35

Deuteranopia (green-blind)

#877A32

Tritanopia (blue-blind)

#DE0039

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #ca3737;
/* rgb */ color: rgb(202, 55, 55);
/* oklch */ color: oklch(56.0% 0.184 25.4);

Tailwind

colors: {
  custom: {
    50: '#e3786e',
    500: '#ca3737',
    950: '#000000',
  },
}

SCSS

$custom: #ca3737;
$custom-light: #e3786e;
$custom-dark: #000000;

JSON

{
  "hex": "#ca3737",
  "rgb": {
    "r": 202,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.56008,
    "c": 0.18416,
    "h": 25.4
  },
  "luminance": 0.15565
}

Semantic roles & 50–950 ramp

primary

#CA3737

secondary

#8ECFCF

accent

#E1E146

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CA3737

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

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