#F87423

CSS

:root {
  --apocalyptic-orange: #f87423;
  --apocalyptic-orange-rgb: 248 116 35;
  --apocalyptic-orange-oklch: oklch(0.705 0.183 46.7);
}

.element {
  color: var(--apocalyptic-orange);
  background-color: hsl(23 94% 55%);
  border-color: oklch(0.705 0.183 46.7);
}

Tailwind CSS v4

@theme {
  --color-apocalyptic-orange: #f87423;
  --color-apocalyptic-orange-50: #ffe6c8;
  --color-apocalyptic-orange-100: #ffd6b2;
  --color-apocalyptic-orange-200: #ffbc8e;
  --color-apocalyptic-orange-300: #ff985e;
  --color-apocalyptic-orange-400: #f2752d;
  --color-apocalyptic-orange-500: #e15000;
  --color-apocalyptic-orange-600: #be4500;
  --color-apocalyptic-orange-700: #993700;
  --color-apocalyptic-orange-800: #732600;
  --color-apocalyptic-orange-900: #511a00;
  --color-apocalyptic-orange-950: #360900;
}

SCSS

$apocalyptic-orange: #f87423;
$apocalyptic-orange-rgb: 248, 116, 35;
$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);
}