#CA3739#CA3739

#CA3739 is a mid, vivid red. Relative luminance 0.156; OKLCH L 56.0% C 0.184 H 24.8°. Best body text is #FFFFFF at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#CA3739
RGB	rgb(202, 55, 57)
HSL	hsl(359, 58%, 50%)
HSV	hsv(359, 73%, 79%)
CMYK	cmyk(0%, 72.8%, 71.8%, 20.8%)
CIE-LAB	lab(46.43, 57.40, 33.77)
CIE-LCH	lch(46.43, 66.60, 30.47°)
OKLab	oklab(56.04% 0.167 0.077)
OKLCH	oklch(56.04% 0.184 24.8)
XYZ	xyz(26.4648, 15.5884, 5.4855)
Luminance	0.1558 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#CA3739 #37CAC8

analogous

#CA3782 #CA3739 #CA7F37

triadic

#CA3739 #39CA37 #3739CA

tetradic

#CA3739 #82CA37 #37CAC8 #7F37CA

square

#CA3739 #82CA37 #37CAC8 #7F37CA

split-complementary

#CA3739 #37CA7F #3782CA

monochromatic

#6A1C1D #9B292B #CA3739 #D76769 #E49899

Accessibility & contrast

On white

5.10

#CA3739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.12

#CA3739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #CA3739

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##CA3739	#FFFFFF	#000000	##FFFFFF
##CA3739	1.00	5.10	4.12	5.10
#FFFFFF	5.10	1.00	21.00	1.00
#000000	4.12	21.00	1.00	21.00
##FFFFFF	5.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625A38

Deuteranopia (green-blind)

#877A34

Tritanopia (blue-blind)

#DE003A

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #ca3739;
/* rgb */ color: rgb(202, 55, 57);
/* oklch */ color: oklch(56.0% 0.184 24.8);

Tailwind

colors: {
  custom: {
    50: '#e3786f',
    500: '#ca3739',
    950: '#000000',
  },
}

SCSS

$custom: #ca3739;
$custom-light: #e3786f;
$custom-dark: #000000;

JSON

{
  "hex": "#ca3739",
  "rgb": {
    "r": 202,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 359.184,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.56036,
    "c": 0.18392,
    "h": 24.8
  },
  "luminance": 0.15584
}

Semantic roles & 50–950 ramp

primary

#CA3739

secondary

#8ECFCE

accent

#E1DF46

background

#FFF7F6

surface

#FEEEEC

border

#D6C9C7

text

#170A07

muted

#857C7A

Preview Lab

Preview with #CA3739

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

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