#9F5B21

CSS

:root {
  --chilli-con-carne: #9f5b21;
  --chilli-con-carne-rgb: 159 91 33;
  --chilli-con-carne-oklch: oklch(0.54 0.113 56.8);
}

.element {
  color: var(--chilli-con-carne);
  background-color: hsl(28 66% 38%);
  border-color: oklch(0.54 0.113 56.8);
}

Tailwind CSS v4

@theme {
  --color-chilli-con-carne: #9f5b21;
  --color-chilli-con-carne-50: #ffeed6;
  --color-chilli-con-carne-100: #ffe0c3;
  --color-chilli-con-carne-200: #fac9a4;
  --color-chilli-con-carne-300: #e3a97c;
  --color-chilli-con-carne-400: #d18c59;
  --color-chilli-con-carne-500: #be7030;
  --color-chilli-con-carne-600: #a05f2b;
  --color-chilli-con-carne-700: #814c22;
  --color-chilli-con-carne-800: #603718;
  --color-chilli-con-carne-900: #43250f;
  --color-chilli-con-carne-950: #2b1403;
}

SCSS

$chilli-con-carne: #9f5b21;
$chilli-con-carne-rgb: 159, 91, 33;
$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);
}