#2A8363

CSS

:root {
  --shadows-of-time: #2a8363;
  --shadows-of-time-rgb: 42 131 99;
  --shadows-of-time-oklch: oklch(0.549 0.098 165.3);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(158 51% 34%);
  border-color: oklch(0.549 0.098 165.3);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #2a8363;
  --color-shadows-of-time-50: #dcffef;
  --color-shadows-of-time-100: #caf3e1;
  --color-shadows-of-time-200: #ace2cc;
  --color-shadows-of-time-300: #85c8ad;
  --color-shadows-of-time-400: #62b190;
  --color-shadows-of-time-500: #379a76;
  --color-shadows-of-time-600: #318364;
  --color-shadows-of-time-700: #276950;
  --color-shadows-of-time-800: #1c4d39;
  --color-shadows-of-time-900: #123527;
  --color-shadows-of-time-950: #042115;
}

SCSS

$shadows-of-time: #2a8363;
$shadows-of-time-rgb: 42, 131, 99;
$shadows-of-time-light: mix(#fff, $shadows-of-time, 20%);
$shadows-of-time-dark: mix(#000, $shadows-of-time, 20%);

.element {
  color: $shadows-of-time;
  box-shadow: 0 0 0 2px rgba($shadows-of-time, 0.35);
}