#A66258

CSS

:root {
  --dried-tomatoes: #a66258;
  --dried-tomatoes-rgb: 166 98 88;
  --dried-tomatoes-oklch: oklch(0.57 0.09 29.1);
}

.element {
  color: var(--dried-tomatoes);
  background-color: hsl(8 31% 50%);
  border-color: oklch(0.57 0.09 29.1);
}

Tailwind CSS v4

@theme {
  --color-dried-tomatoes: #a66258;
  --color-dried-tomatoes-50: #ffece6;
  --color-dried-tomatoes-100: #ffded6;
  --color-dried-tomatoes-200: #f9c7bd;
  --color-dried-tomatoes-300: #e2a79b;
  --color-dried-tomatoes-400: #ce8a80;
  --color-dried-tomatoes-500: #bb6e63;
  --color-dried-tomatoes-600: #9e5e54;
  --color-dried-tomatoes-700: #7e4b43;
  --color-dried-tomatoes-800: #5e3631;
  --color-dried-tomatoes-900: #422521;
  --color-dried-tomatoes-950: #2a1311;
}

SCSS

$dried-tomatoes: #a66258;
$dried-tomatoes-rgb: 166, 98, 88;
$dried-tomatoes-light: mix(#fff, $dried-tomatoes, 20%);
$dried-tomatoes-dark: mix(#000, $dried-tomatoes, 20%);

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