#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
RGBrgb(202, 55, 55)
HSLhsl(0, 58%, 50%)
HSVhsv(0, 73%, 79%)
CMYKcmyk(0%, 72.8%, 72.8%, 20.8%)
CIE-LABlab(46.40, 57.32, 34.90)
CIE-LCHlch(46.40, 67.11, 31.34°)
OKLaboklab(56.01% 0.1663 0.0791)
OKLCHoklch(56.01% 0.184 25.4)
XYZxyz(26.4159, 15.5688, 5.2278)
Luminance0.1557 (WCAG relative)
Temperaturewarm
Familyred

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
##CA37371.005.114.115.11
#FFFFFF5.111.0021.001.00
#0000004.1121.001.0021.00
##FFFFFF5.111.0021.001.00

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.

Preview Lab → · Contrast checker → · Palette generator →

#CA3737 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva