#C85200

CSS

:root {
  --dark-orange: #c85200;
  --dark-orange-rgb: 200 82 0;
  --dark-orange-oklch: oklch(0.584 0.167 45);
}

.element {
  color: var(--dark-orange);
  background-color: hsl(25 100% 39%);
  border-color: oklch(0.584 0.167 45);
}

Tailwind CSS v4

@theme {
  --color-dark-orange: #c85200;
  --color-dark-orange-50: #ffe7cd;
  --color-dark-orange-100: #ffd8b8;
  --color-dark-orange-200: #ffbe96;
  --color-dark-orange-300: #fd9b6a;
  --color-dark-orange-400: #ed7941;
  --color-dark-orange-500: #db5700;
  --color-dark-orange-600: #b94a00;
  --color-dark-orange-700: #953b01;
  --color-dark-orange-800: #6f2904;
  --color-dark-orange-900: #4f1c04;
  --color-dark-orange-950: #340b00;
}

SCSS

$dark-orange: #c85200;
$dark-orange-rgb: 200, 82, 0;
$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);
}