#975F2F

CSS

:root {
  --chilli-con-carne: #975f2f;
  --chilli-con-carne-rgb: 151 95 47;
  --chilli-con-carne-oklch: oklch(0.538 0.097 59);
}

.element {
  color: var(--chilli-con-carne);
  background-color: hsl(28 53% 39%);
  border-color: oklch(0.538 0.097 59);
}

Tailwind CSS v4

@theme {
  --color-chilli-con-carne: #975f2f;
  --color-chilli-con-carne-50: #fff0da;
  --color-chilli-con-carne-100: #ffe1c8;
  --color-chilli-con-carne-200: #f4ccab;
  --color-chilli-con-carne-300: #dcac85;
  --color-chilli-con-carne-400: #c99063;
  --color-chilli-con-carne-500: #b57540;
  --color-chilli-con-carne-600: #996437;
  --color-chilli-con-carne-700: #7b4f2b;
  --color-chilli-con-carne-800: #5b391f;
  --color-chilli-con-carne-900: #402714;
  --color-chilli-con-carne-950: #291506;
}

SCSS

$chilli-con-carne: #975f2f;
$chilli-con-carne-rgb: 151, 95, 47;
$chilli-con-carne-light: mix(#fff, $chilli-con-carne, 20%);
$chilli-con-carne-dark: mix(#000, $chilli-con-carne, 20%);

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