#BD5535

CSS

:root {
  --hot-chilli: #bd5535;
  --hot-chilli-rgb: 189 85 53;
  --hot-chilli-oklch: oklch(0.575 0.142 37.6);
}

.element {
  color: var(--hot-chilli);
  background-color: hsl(14 56% 47%);
  border-color: oklch(0.575 0.142 37.6);
}

Tailwind CSS v4

@theme {
  --color-hot-chilli: #bd5535;
  --color-hot-chilli-50: #ffe8d7;
  --color-hot-chilli-100: #ffd9c5;
  --color-hot-chilli-200: #ffc0a7;
  --color-hot-chilli-300: #f69e80;
  --color-hot-chilli-400: #e57e5f;
  --color-hot-chilli-500: #d25e39;
  --color-hot-chilli-600: #b25032;
  --color-hot-chilli-700: #8f4028;
  --color-hot-chilli-800: #6b2d1d;
  --color-hot-chilli-900: #4b1e13;
  --color-hot-chilli-950: #310e05;
}

SCSS

$hot-chilli: #bd5535;
$hot-chilli-rgb: 189, 85, 53;
$hot-chilli-light: mix(#fff, $hot-chilli, 20%);
$hot-chilli-dark: mix(#000, $hot-chilli, 20%);

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