#D14900

CSS

:root {
  --mellow-mango: #d14900;
  --mellow-mango-rgb: 209 73 0;
  --mellow-mango-oklch: oklch(0.587 0.183 40.3);
}

.element {
  color: var(--mellow-mango);
  background-color: hsl(21 100% 41%);
  border-color: oklch(0.587 0.183 40.3);
}

Tailwind CSS v4

@theme {
  --color-mellow-mango: #d14900;
  --color-mellow-mango-50: #ffe5cc;
  --color-mellow-mango-100: #ffd4b8;
  --color-mellow-mango-200: #ffba95;
  --color-mellow-mango-300: #ff9568;
  --color-mellow-mango-400: #f57240;
  --color-mellow-mango-500: #e44b00;
  --color-mellow-mango-600: #c04100;
  --color-mellow-mango-700: #9b3400;
  --color-mellow-mango-800: #742304;
  --color-mellow-mango-900: #521804;
  --color-mellow-mango-950: #360700;
}

SCSS

$mellow-mango: #d14900;
$mellow-mango-rgb: 209, 73, 0;
$mellow-mango-light: mix(#fff, $mellow-mango, 20%);
$mellow-mango-dark: mix(#000, $mellow-mango, 20%);

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