#D63F46

CSS

:root {
  --poppy-red: #d63f46;
  --poppy-red-rgb: 214 63 70;
  --poppy-red-oklch: oklch(0.591 0.187 22.6);
}

.element {
  color: var(--poppy-red);
  background-color: hsl(357 65% 54%);
  border-color: oklch(0.591 0.187 22.6);
}

Tailwind CSS v4

@theme {
  --color-poppy-red: #d63f46;
  --color-poppy-red-50: #ffe1db;
  --color-poppy-red-100: #ffd0c9;
  --color-poppy-red-200: #ffb4ac;
  --color-poppy-red-300: #ff8e87;
  --color-poppy-red-400: #f96969;
  --color-poppy-red-500: #e83e48;
  --color-poppy-red-600: #c4363e;
  --color-poppy-red-700: #9e2b31;
  --color-poppy-red-800: #761d25;
  --color-poppy-red-900: #531419;
  --color-poppy-red-950: #370409;
}

SCSS

$poppy-red: #d63f46;
$poppy-red-rgb: 214, 63, 70;
$poppy-red-light: mix(#fff, $poppy-red, 20%);
$poppy-red-dark: mix(#000, $poppy-red, 20%);

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