#676142

CSS

:root {
  --eat-your-greens: #676142;
  --eat-your-greens-rgb: 103 97 66;
  --eat-your-greens-oklch: oklch(0.49 0.047 98.5);
}

.element {
  color: var(--eat-your-greens);
  background-color: hsl(50 22% 33%);
  border-color: oklch(0.49 0.047 98.5);
}

Tailwind CSS v4

@theme {
  --color-eat-your-greens: #676142;
  --color-eat-your-greens-50: #f8f6e7;
  --color-eat-your-greens-100: #ebe9d7;
  --color-eat-your-greens-200: #d8d5bf;
  --color-eat-your-greens-300: #bcb89d;
  --color-eat-your-greens-400: #a59f80;
  --color-eat-your-greens-500: #8e8763;
  --color-eat-your-greens-600: #787254;
  --color-eat-your-greens-700: #605b43;
  --color-eat-your-greens-800: #474330;
  --color-eat-your-greens-900: #312e21;
  --color-eat-your-greens-950: #1d1b10;
}

SCSS

$eat-your-greens: #676142;
$eat-your-greens-rgb: 103, 97, 66;
$eat-your-greens-light: mix(#fff, $eat-your-greens, 20%);
$eat-your-greens-dark: mix(#000, $eat-your-greens, 20%);

.element {
  color: $eat-your-greens;
  box-shadow: 0 0 0 2px rgba($eat-your-greens, 0.35);
}