#D43951

CSS

:root {
  --flesh-and-blood: #d43951;
  --flesh-and-blood-rgb: 212 57 81;
  --flesh-and-blood-oklch: oklch(0.583 0.191 17);
}

.element {
  color: var(--flesh-and-blood);
  background-color: hsl(351 64% 53%);
  border-color: oklch(0.583 0.191 17);
}

Tailwind CSS v4

@theme {
  --color-flesh-and-blood: #d43951;
  --color-flesh-and-blood-50: #ffe0e0;
  --color-flesh-and-blood-100: #ffcfcf;
  --color-flesh-and-blood-200: #ffb2b4;
  --color-flesh-and-blood-300: #ff8c90;
  --color-flesh-and-blood-400: #fa6675;
  --color-flesh-and-blood-500: #e93a57;
  --color-flesh-and-blood-600: #c4334a;
  --color-flesh-and-blood-700: #9e293b;
  --color-flesh-and-blood-800: #761c2c;
  --color-flesh-and-blood-900: #53121e;
  --color-flesh-and-blood-950: #37030e;
}

SCSS

$flesh-and-blood: #d43951;
$flesh-and-blood-rgb: 212, 57, 81;
$flesh-and-blood-light: mix(#fff, $flesh-and-blood, 20%);
$flesh-and-blood-dark: mix(#000, $flesh-and-blood, 20%);

.element {
  color: $flesh-and-blood;
  box-shadow: 0 0 0 2px rgba($flesh-and-blood, 0.35);
}