#C25616

CSS

:root {
  --dark-orange: #c25616;
  --dark-orange-rgb: 194 86 22;
  --dark-orange-oklch: oklch(0.582 0.155 45.6);
}

.element {
  color: var(--dark-orange);
  background-color: hsl(22 80% 42%);
  border-color: oklch(0.582 0.155 45.6);
}

Tailwind CSS v4

@theme {
  --color-dark-orange: #c25616;
  --color-dark-orange-50: #ffe9d0;
  --color-dark-orange-100: #ffd9bc;
  --color-dark-orange-200: #ffc09b;
  --color-dark-orange-300: #f89e70;
  --color-dark-orange-400: #e87d49;
  --color-dark-orange-500: #d55c0f;
  --color-dark-orange-600: #b44f12;
  --color-dark-orange-700: #913f0f;
  --color-dark-orange-800: #6c2c0c;
  --color-dark-orange-900: #4c1e08;
  --color-dark-orange-950: #320d00;
}

SCSS

$dark-orange: #c25616;
$dark-orange-rgb: 194, 86, 22;
$dark-orange-light: mix(#fff, $dark-orange, 20%);
$dark-orange-dark: mix(#000, $dark-orange, 20%);

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