#C35617

CSS

:root {
  --dark-orange: #c35617;
  --dark-orange-rgb: 195 86 23;
  --dark-orange-oklch: oklch(0.583 0.156 45.2);
}

.element {
  color: var(--dark-orange);
  background-color: hsl(22 79% 43%);
  border-color: oklch(0.583 0.156 45.2);
}

Tailwind CSS v4

@theme {
  --color-dark-orange: #c35617;
  --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: #d65c0f;
  --color-dark-orange-600: #b54f13;
  --color-dark-orange-700: #913f10;
  --color-dark-orange-800: #6d2c0c;
  --color-dark-orange-900: #4d1e08;
  --color-dark-orange-950: #320d00;
}

SCSS

$dark-orange: #c35617;
$dark-orange-rgb: 195, 86, 23;
$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);
}