#402020

CSS

:root {
  --brown-coffee: #402020;
  --brown-coffee-rgb: 64 32 32;
  --brown-coffee-oklch: oklch(0.287 0.05 20.6);
}

.element {
  color: var(--brown-coffee);
  background-color: hsl(0 33% 19%);
  border-color: oklch(0.287 0.05 20.6);
}

Tailwind CSS v4

@theme {
  --color-brown-coffee: #402020;
  --color-brown-coffee-50: #fff0ef;
  --color-brown-coffee-100: #f8e2e0;
  --color-brown-coffee-200: #e9ccca;
  --color-brown-coffee-300: #d0aeac;
  --color-brown-coffee-400: #ba9392;
  --color-brown-coffee-500: #a57978;
  --color-brown-coffee-600: #8b6766;
  --color-brown-coffee-700: #705251;
  --color-brown-coffee-800: #523c3c;
  --color-brown-coffee-900: #392929;
  --color-brown-coffee-950: #241717;
}

SCSS

$brown-coffee: #402020;
$brown-coffee-rgb: 64, 32, 32;
$brown-coffee-light: mix(#fff, $brown-coffee, 20%);
$brown-coffee-dark: mix(#000, $brown-coffee, 20%);

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