#D43737#D43737

#D43737 is a mid, vivid red. Relative luminance 0.170; OKLCH L 57.7% C 0.194 H 25.7°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#D43737
RGB	rgb(212, 55, 55)
HSL	hsl(0, 65%, 52%)
HSV	hsv(0, 74%, 83%)
CMYK	cmyk(0%, 74.1%, 74.1%, 16.9%)
CIE-LAB	lab(48.27, 60.38, 37.52)
CIE-LCH	lch(48.27, 71.09, 31.86°)
OKLab	oklab(57.74% 0.1748 0.0842)
OKLCH	oklch(57.74% 0.194 25.7)
XYZ	xyz(29.2105, 17.0098, 5.3588)
Luminance	0.1701 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#D43737 #37D4D4

analogous

#D43786 #D43737 #D48637

triadic

#D43737 #37D437 #3737D4

tetradic

#D43737 #86D437 #37D4D4 #8637D4

square

#D43737 #86D437 #37D4D4 #8637D4

split-complementary

#D43737 #37D486 #3786D4

monochromatic

#771A1A #A92424 #D43737 #DF6969 #EA9C9C

Accessibility & contrast

On white

4.77

#D43737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#D43737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #D43737

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##D43737	#FFFFFF	#000000	##FFFFFF
##D43737	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#665D35

Deuteranopia (green-blind)

#8D7F31

Tritanopia (blue-blind)

#E90039

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #d43737;
/* rgb */ color: rgb(212, 55, 55);
/* oklch */ color: oklch(57.7% 0.194 25.7);

Tailwind

colors: {
  custom: {
    50: '#ea7a6e',
    500: '#d43737',
    950: '#000000',
  },
}

SCSS

$custom: #d43737;
$custom-light: #ea7a6e;
$custom-dark: #000000;

JSON

{
  "hex": "#d43737",
  "rgb": {
    "r": 212,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 64.609,
    "l": 52.353
  },
  "oklch": {
    "l": 0.57738,
    "c": 0.19402,
    "h": 25.7
  },
  "luminance": 0.17005
}

Semantic roles & 50–950 ramp

primary

#D43737

secondary

#91D6D6

accent

#E8E840

background

#FFF7F6

surface

#FFEEEC

border

#D7C9C7

text

#180A07

muted

#867C7A

Preview Lab

Preview with #D43737

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

Preview Lab → · Contrast checker → · Palette generator →