#3C8169

CSS

:root {
  --shadows-of-time: #3c8169;
  --shadows-of-time-rgb: 60 129 105;
  --shadows-of-time-oklch: oklch(0.551 0.08 168.1);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(159 37% 37%);
  border-color: oklch(0.551 0.08 168.1);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #3c8169;
  --color-shadows-of-time-50: #e0fdf2;
  --color-shadows-of-time-100: #cff1e4;
  --color-shadows-of-time-200: #b3e0cf;
  --color-shadows-of-time-300: #8ec5b1;
  --color-shadows-of-time-400: #6dae95;
  --color-shadows-of-time-500: #4a977c;
  --color-shadows-of-time-600: #3f8069;
  --color-shadows-of-time-700: #336654;
  --color-shadows-of-time-800: #244b3c;
  --color-shadows-of-time-900: #183429;
  --color-shadows-of-time-950: #082017;
}

SCSS

$shadows-of-time: #3c8169;
$shadows-of-time-rgb: 60, 129, 105;
$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);
}