#CB4F0E

CSS

:root {
  --dark-orange: #cb4f0e;
  --dark-orange-rgb: 203 79 14;
  --dark-orange-oklch: oklch(0.586 0.171 42);
}

.element {
  color: var(--dark-orange);
  background-color: hsl(21 87% 43%);
  border-color: oklch(0.586 0.171 42);
}

Tailwind CSS v4

@theme {
  --color-dark-orange: #cb4f0e;
  --color-dark-orange-50: #ffe6ce;
  --color-dark-orange-100: #ffd6ba;
  --color-dark-orange-200: #ffbd98;
  --color-dark-orange-300: #ff996c;
  --color-dark-orange-400: #f07745;
  --color-dark-orange-500: #de5300;
  --color-dark-orange-600: #bb4708;
  --color-dark-orange-700: #973908;
  --color-dark-orange-800: #712708;
  --color-dark-orange-900: #501b06;
  --color-dark-orange-950: #350a00;
}

SCSS

$dark-orange: #cb4f0e;
$dark-orange-rgb: 203, 79, 14;
$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);
}