#7AB859

CSS

:root {
  --leafy-greens: #7ab859;
  --leafy-greens-rgb: 122 184 89;
  --leafy-greens-oklch: oklch(0.719 0.143 135.8);
}

.element {
  color: var(--leafy-greens);
  background-color: hsl(99 40% 54%);
  border-color: oklch(0.719 0.143 135.8);
}

Tailwind CSS v4

@theme {
  --color-leafy-greens: #7ab859;
  --color-leafy-greens-50: #e2ffd8;
  --color-leafy-greens-100: #d1f4c5;
  --color-leafy-greens-200: #b7e3a7;
  --color-leafy-greens-300: #93c980;
  --color-leafy-greens-400: #77b158;
  --color-leafy-greens-500: #579a2d;
  --color-leafy-greens-600: #4a8328;
  --color-leafy-greens-700: #3b6920;
  --color-leafy-greens-800: #2d4c12;
  --color-leafy-greens-900: #1e350b;
  --color-leafy-greens-950: #0e2001;
}

SCSS

$leafy-greens: #7ab859;
$leafy-greens-rgb: 122, 184, 89;
$leafy-greens-light: mix(#fff, $leafy-greens, 20%);
$leafy-greens-dark: mix(#000, $leafy-greens, 20%);

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