#FF6400

CSS

:root {
  --safety-orange: #ff6400;
  --safety-orange-rgb: 255 100 0;
  --safety-orange-oklch: oklch(0.693 0.206 42.9);
}

.element {
  color: var(--safety-orange);
  background-color: hsl(24 100% 50%);
  border-color: oklch(0.693 0.206 42.9);
}

Tailwind CSS v4

@theme {
  --color-safety-orange: #ff6400;
  --color-safety-orange-50: #ffe3c5;
  --color-safety-orange-100: #ffd2af;
  --color-safety-orange-200: #ffb789;
  --color-safety-orange-300: #ff9157;
  --color-safety-orange-400: #fd6b1f;
  --color-safety-orange-500: #ec3e00;
  --color-safety-orange-600: #c83700;
  --color-safety-orange-700: #a12c00;
  --color-safety-orange-800: #791d00;
  --color-safety-orange-900: #551400;
  --color-safety-orange-950: #390400;
}

SCSS

$safety-orange: #ff6400;
$safety-orange-rgb: 255, 100, 0;
$safety-orange-light: mix(#fff, $safety-orange, 20%);
$safety-orange-dark: mix(#000, $safety-orange, 20%);

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