#DB0100

CSS

:root {
  --red-pegasus: #db0100;
  --red-pegasus-rgb: 219 1 0;
  --red-pegasus-oklch: oklch(0.56 0.229 29.3);
}

.element {
  color: var(--red-pegasus);
  background-color: hsl(0 100% 43%);
  border-color: oklch(0.56 0.229 29.3);
}

Tailwind CSS v4

@theme {
  --color-red-pegasus: #db0100;
  --color-red-pegasus-50: #ffddcd;
  --color-red-pegasus-100: #ffcbb9;
  --color-red-pegasus-200: #ffad97;
  --color-red-pegasus-300: #ff836a;
  --color-red-pegasus-400: #ff5745;
  --color-red-pegasus-500: #fa0703;
  --color-red-pegasus-600: #d3140c;
  --color-red-pegasus-700: #aa120b;
  --color-red-pegasus-800: #7f080c;
  --color-red-pegasus-900: #5a0708;
  --color-red-pegasus-950: #3d0000;
}

SCSS

$red-pegasus: #db0100;
$red-pegasus-rgb: 219, 1, 0;
$red-pegasus-light: mix(#fff, $red-pegasus, 20%);
$red-pegasus-dark: mix(#000, $red-pegasus, 20%);

.element {
  color: $red-pegasus;
  box-shadow: 0 0 0 2px rgba($red-pegasus, 0.35);
}