#F3772A

CSS

:root {
  --apocalyptic-orange: #f3772a;
  --apocalyptic-orange-rgb: 243 119 42;
  --apocalyptic-orange-oklch: oklch(0.703 0.174 47.8);
}

.element {
  color: var(--apocalyptic-orange);
  background-color: hsl(23 89% 56%);
  border-color: oklch(0.703 0.174 47.8);
}

Tailwind CSS v4

@theme {
  --color-apocalyptic-orange: #f3772a;
  --color-apocalyptic-orange-50: #ffe8c9;
  --color-apocalyptic-orange-100: #ffd8b4;
  --color-apocalyptic-orange-200: #ffbe90;
  --color-apocalyptic-orange-300: #fe9b61;
  --color-apocalyptic-orange-400: #ee7933;
  --color-apocalyptic-orange-500: #dd5600;
  --color-apocalyptic-orange-600: #ba4a00;
  --color-apocalyptic-orange-700: #963b00;
  --color-apocalyptic-orange-800: #702900;
  --color-apocalyptic-orange-900: #4f1c00;
  --color-apocalyptic-orange-950: #340b00;
}

SCSS

$apocalyptic-orange: #f3772a;
$apocalyptic-orange-rgb: 243, 119, 42;
$apocalyptic-orange-light: mix(#fff, $apocalyptic-orange, 20%);
$apocalyptic-orange-dark: mix(#000, $apocalyptic-orange, 20%);

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