#2B8367

CSS

:root {
  --shadows-of-time: #2b8367;
  --shadows-of-time-rgb: 43 131 103;
  --shadows-of-time-oklch: oklch(0.55 0.094 168.1);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(161 51% 34%);
  border-color: oklch(0.55 0.094 168.1);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #2b8367;
  --color-shadows-of-time-50: #dcfef1;
  --color-shadows-of-time-100: #caf3e3;
  --color-shadows-of-time-200: #ade2ce;
  --color-shadows-of-time-300: #85c7b0;
  --color-shadows-of-time-400: #62b194;
  --color-shadows-of-time-500: #389a7a;
  --color-shadows-of-time-600: #318268;
  --color-shadows-of-time-700: #276853;
  --color-shadows-of-time-800: #1c4d3b;
  --color-shadows-of-time-900: #123528;
  --color-shadows-of-time-950: #042016;
}

SCSS

$shadows-of-time: #2b8367;
$shadows-of-time-rgb: 43, 131, 103;
$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);
}